Home / 20,650.38-28,502.10-12,699.42

Finding the Fourth Proportional to 20,650.38, 28,502.10 and 12,699.42

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Solution

The fourth proportional to 20,650.38, 28,502.10 and 12,699.42 is: 17,528.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.38 : 28,502.10 = 12,699.42 : x
  2. Step 2: Convert to fraction form
    20,650.38/28,502.10 = 12,699.42/x
  3. Step 3: Cross multiply
    20,650.38x = 28,502.10 × 12,699.42
  4. Step 4: Simplify right side
    20,650.38x = 361,960,138.78
  5. Step 5: Solve for x
    x = 361,960,138.78/20,650.38
  6. Step 6: Final answer
    x = 17,528.01

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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.