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Finding the Fourth Proportional to 28,295.87, 38,998.87 and 20,726.11

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Solution

The fourth proportional to 28,295.87, 38,998.87 and 20,726.11 is: 28,565.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,295.87 : 38,998.87 = 20,726.11 : x
  2. Step 2: Convert to fraction form
    28,295.87/38,998.87 = 20,726.11/x
  3. Step 3: Cross multiply
    28,295.87x = 38,998.87 × 20,726.11
  4. Step 4: Simplify right side
    28,295.87x = 808,294,915.18
  5. Step 5: Solve for x
    x = 808,294,915.18/28,295.87
  6. Step 6: Final answer
    x = 28,565.83

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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.