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Finding the Fourth Proportional to 7,801,973.20, 11,702,959.80 and 7,689,998.80

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Solution

The fourth proportional to 7,801,973.20, 11,702,959.80 and 7,689,998.80 is: 11,534,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,801,973.20 : 11,702,959.80 = 7,689,998.80 : x
  2. Step 2: Convert to fraction form
    7,801,973.20/11,702,959.80 = 7,689,998.80/x
  3. Step 3: Cross multiply
    7,801,973.20x = 11,702,959.80 × 7,689,998.80
  4. Step 4: Simplify right side
    7,801,973.20x = 89,995,746,818,448.25
  5. Step 5: Solve for x
    x = 89,995,746,818,448.25/7,801,973.20
  6. Step 6: Final answer
    x = 11,534,998.20

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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.