Home / 28,269.38-38,989.88-20,712.89

Finding the Fourth Proportional to 28,269.38, 38,989.88 and 20,712.89

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Solution

The fourth proportional to 28,269.38, 38,989.88 and 20,712.89 is: 28,567.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269.38 : 38,989.88 = 20,712.89 : x
  2. Step 2: Convert to fraction form
    28,269.38/38,989.88 = 20,712.89/x
  3. Step 3: Cross multiply
    28,269.38x = 38,989.88 × 20,712.89
  4. Step 4: Simplify right side
    28,269.38x = 807,593,095.55
  5. Step 5: Solve for x
    x = 807,593,095.55/28,269.38
  6. Step 6: Final answer
    x = 28,567.77

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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.