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Finding the Fourth Proportional to 18,356,500.80, 27,545,248.80 and 12,680,798.40

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Solution

The fourth proportional to 18,356,500.80, 27,545,248.80 and 12,680,798.40 is: 19,028,449.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356,500.80 : 27,545,248.80 = 12,680,798.40 : x
  2. Step 2: Convert to fraction form
    18,356,500.80/27,545,248.80 = 12,680,798.40/x
  3. Step 3: Cross multiply
    18,356,500.80x = 27,545,248.80 × 12,680,798.40
  4. Step 4: Simplify right side
    18,356,500.80x = 349,295,746,910,641.94
  5. Step 5: Solve for x
    x = 349,295,746,910,641.94/18,356,500.80
  6. Step 6: Final answer
    x = 19,028,449.42

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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.