Home / 20,418,153.53-28,145,145.42-13,880,432.78

Finding the Fourth Proportional to 20,418,153.53, 28,145,145.42 and 13,880,432.78

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Solution

The fourth proportional to 20,418,153.53, 28,145,145.42 and 13,880,432.78 is: 19,133,306.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418,153.53 : 28,145,145.42 = 13,880,432.78 : x
  2. Step 2: Convert to fraction form
    20,418,153.53/28,145,145.42 = 13,880,432.78/x
  3. Step 3: Cross multiply
    20,418,153.53x = 28,145,145.42 × 13,880,432.78
  4. Step 4: Simplify right side
    20,418,153.53x = 390,666,798,944,909.19
  5. Step 5: Solve for x
    x = 390,666,798,944,909.19/20,418,153.53
  6. Step 6: Final answer
    x = 19,133,306.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.