Home / 20,613.55-28,438.65-13,451.89

Finding the Fourth Proportional to 20,613.55, 28,438.65 and 13,451.89

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Solution

The fourth proportional to 20,613.55, 28,438.65 and 13,451.89 is: 18,558.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.55 : 28,438.65 = 13,451.89 : x
  2. Step 2: Convert to fraction form
    20,613.55/28,438.65 = 13,451.89/x
  3. Step 3: Cross multiply
    20,613.55x = 28,438.65 × 13,451.89
  4. Step 4: Simplify right side
    20,613.55x = 382,553,591.55
  5. Step 5: Solve for x
    x = 382,553,591.55/20,613.55
  6. Step 6: Final answer
    x = 18,558.36

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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.