Home / 20,705.38-28,572.40-11,752.75

Finding the Fourth Proportional to 20,705.38, 28,572.40 and 11,752.75

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Solution

The fourth proportional to 20,705.38, 28,572.40 and 11,752.75 is: 16,218.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.38 : 28,572.40 = 11,752.75 : x
  2. Step 2: Convert to fraction form
    20,705.38/28,572.40 = 11,752.75/x
  3. Step 3: Cross multiply
    20,705.38x = 28,572.40 × 11,752.75
  4. Step 4: Simplify right side
    20,705.38x = 335,804,173.29
  5. Step 5: Solve for x
    x = 335,804,173.29/20,705.38
  6. Step 6: Final answer
    x = 16,218.21

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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.