Home / 12,746.12-19,119.24-3,980.30

Finding the Fourth Proportional to 12,746.12, 19,119.24 and 3,980.30

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Solution

The fourth proportional to 12,746.12, 19,119.24 and 3,980.30 is: 5,970.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,746.12 : 19,119.24 = 3,980.30 : x
  2. Step 2: Convert to fraction form
    12,746.12/19,119.24 = 3,980.30/x
  3. Step 3: Cross multiply
    12,746.12x = 19,119.24 × 3,980.30
  4. Step 4: Simplify right side
    12,746.12x = 76,100,215.38
  5. Step 5: Solve for x
    x = 76,100,215.38/12,746.12
  6. Step 6: Final answer
    x = 5,970.46

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Half scale
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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.