Home / 20,705.50-28,572.12-11,753.18

Finding the Fourth Proportional to 20,705.50, 28,572.12 and 11,753.18

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Solution

The fourth proportional to 20,705.50, 28,572.12 and 11,753.18 is: 16,218.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.50 : 28,572.12 = 11,753.18 : x
  2. Step 2: Convert to fraction form
    20,705.50/28,572.12 = 11,753.18/x
  3. Step 3: Cross multiply
    20,705.50x = 28,572.12 × 11,753.18
  4. Step 4: Simplify right side
    20,705.50x = 335,813,269.34
  5. Step 5: Solve for x
    x = 335,813,269.34/20,705.50
  6. Step 6: Final answer
    x = 16,218.55

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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.