Home / 20,391,493.76-28,120,700.77-13,700,956.42

Finding the Fourth Proportional to 20,391,493.76, 28,120,700.77 and 13,700,956.42

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Solution

The fourth proportional to 20,391,493.76, 28,120,700.77 and 13,700,956.42 is: 18,894,177.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391,493.76 : 28,120,700.77 = 13,700,956.42 : x
  2. Step 2: Convert to fraction form
    20,391,493.76/28,120,700.77 = 13,700,956.42/x
  3. Step 3: Cross multiply
    20,391,493.76x = 28,120,700.77 × 13,700,956.42
  4. Step 4: Simplify right side
    20,391,493.76x = 385,280,495,749,630.44
  5. Step 5: Solve for x
    x = 385,280,495,749,630.44/20,391,493.76
  6. Step 6: Final answer
    x = 18,894,177.16

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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.