Home / 12,313,709.40-18,470,564.10-7,778,746.20

Finding the Fourth Proportional to 12,313,709.40, 18,470,564.10 and 7,778,746.20

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Solution

The fourth proportional to 12,313,709.40, 18,470,564.10 and 7,778,746.20 is: 11,668,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,313,709.40 : 18,470,564.10 = 7,778,746.20 : x
  2. Step 2: Convert to fraction form
    12,313,709.40/18,470,564.10 = 7,778,746.20/x
  3. Step 3: Cross multiply
    12,313,709.40x = 18,470,564.10 × 7,778,746.20
  4. Step 4: Simplify right side
    12,313,709.40x = 143,677,830,304,731.44
  5. Step 5: Solve for x
    x = 143,677,830,304,731.44/12,313,709.40
  6. Step 6: Final answer
    x = 11,668,119.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.