Home / 42,781.55-64,118.85-20,588.97

Finding the Fourth Proportional to 42,781.55, 64,118.85 and 20,588.97

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Solution

The fourth proportional to 42,781.55, 64,118.85 and 20,588.97 is: 30,857.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,781.55 : 64,118.85 = 20,588.97 : x
  2. Step 2: Convert to fraction form
    42,781.55/64,118.85 = 20,588.97/x
  3. Step 3: Cross multiply
    42,781.55x = 64,118.85 × 20,588.97
  4. Step 4: Simplify right side
    42,781.55x = 1,320,141,079.08
  5. Step 5: Solve for x
    x = 1,320,141,079.08/42,781.55
  6. Step 6: Final answer
    x = 30,857.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.