Home / 42,785.47-64,177.98-11,620.72

Finding the Fourth Proportional to 42,785.47, 64,177.98 and 11,620.72

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Solution

The fourth proportional to 42,785.47, 64,177.98 and 11,620.72 is: 17,431.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,785.47 : 64,177.98 = 11,620.72 : x
  2. Step 2: Convert to fraction form
    42,785.47/64,177.98 = 11,620.72/x
  3. Step 3: Cross multiply
    42,785.47x = 64,177.98 × 11,620.72
  4. Step 4: Simplify right side
    42,785.47x = 745,794,335.75
  5. Step 5: Solve for x
    x = 745,794,335.75/42,785.47
  6. Step 6: Final answer
    x = 17,431.02

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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.