Home / 20,613.28-28,461.12-12,666.16

Finding the Fourth Proportional to 20,613.28, 28,461.12 and 12,666.16

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Solution

The fourth proportional to 20,613.28, 28,461.12 and 12,666.16 is: 17,488.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.28 : 28,461.12 = 12,666.16 : x
  2. Step 2: Convert to fraction form
    20,613.28/28,461.12 = 12,666.16/x
  3. Step 3: Cross multiply
    20,613.28x = 28,461.12 × 12,666.16
  4. Step 4: Simplify right side
    20,613.28x = 360,493,099.70
  5. Step 5: Solve for x
    x = 360,493,099.70/20,613.28
  6. Step 6: Final answer
    x = 17,488.39

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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.