Home / 20,781.27-28,677.33-11,349.90

Finding the Fourth Proportional to 20,781.27, 28,677.33 and 11,349.90

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Solution

The fourth proportional to 20,781.27, 28,677.33 and 11,349.90 is: 15,662.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.27 : 28,677.33 = 11,349.90 : x
  2. Step 2: Convert to fraction form
    20,781.27/28,677.33 = 11,349.90/x
  3. Step 3: Cross multiply
    20,781.27x = 28,677.33 × 11,349.90
  4. Step 4: Simplify right side
    20,781.27x = 325,484,827.77
  5. Step 5: Solve for x
    x = 325,484,827.77/20,781.27
  6. Step 6: Final answer
    x = 15,662.41

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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.