Home / 20,658.13-28,508.13-12,160.18

Finding the Fourth Proportional to 20,658.13, 28,508.13 and 12,160.18

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Solution

The fourth proportional to 20,658.13, 28,508.13 and 12,160.18 is: 16,781.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.13 : 28,508.13 = 12,160.18 : x
  2. Step 2: Convert to fraction form
    20,658.13/28,508.13 = 12,160.18/x
  3. Step 3: Cross multiply
    20,658.13x = 28,508.13 × 12,160.18
  4. Step 4: Simplify right side
    20,658.13x = 346,663,992.26
  5. Step 5: Solve for x
    x = 346,663,992.26/20,658.13
  6. Step 6: Final answer
    x = 16,781.00

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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.