Home / 42,761.60-64,132.68-20,561.12

Finding the Fourth Proportional to 42,761.60, 64,132.68 and 20,561.12

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Solution

The fourth proportional to 42,761.60, 64,132.68 and 20,561.12 is: 30,837.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,761.60 : 64,132.68 = 20,561.12 : x
  2. Step 2: Convert to fraction form
    42,761.60/64,132.68 = 20,561.12/x
  3. Step 3: Cross multiply
    42,761.60x = 64,132.68 × 20,561.12
  4. Step 4: Simplify right side
    42,761.60x = 1,318,639,729.40
  5. Step 5: Solve for x
    x = 1,318,639,729.40/42,761.60
  6. Step 6: Final answer
    x = 30,837.01

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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.