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Finding the Fourth Proportional to 18,697,843.20, 28,046,764.80 and 15,506,572.80

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Solution

The fourth proportional to 18,697,843.20, 28,046,764.80 and 15,506,572.80 is: 23,259,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697,843.20 : 28,046,764.80 = 15,506,572.80 : x
  2. Step 2: Convert to fraction form
    18,697,843.20/28,046,764.80 = 15,506,572.80/x
  3. Step 3: Cross multiply
    18,697,843.20x = 28,046,764.80 × 15,506,572.80
  4. Step 4: Simplify right side
    18,697,843.20x = 434,909,200,175,677.50
  5. Step 5: Solve for x
    x = 434,909,200,175,677.50/18,697,843.20
  6. Step 6: Final answer
    x = 23,259,859.20

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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.