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Finding the Fourth Proportional to 42,660.64, 64,001.04 and 19,287.04

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Solution

The fourth proportional to 42,660.64, 64,001.04 and 19,287.04 is: 28,935.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,660.64 : 64,001.04 = 19,287.04 : x
  2. Step 2: Convert to fraction form
    42,660.64/64,001.04 = 19,287.04/x
  3. Step 3: Cross multiply
    42,660.64x = 64,001.04 × 19,287.04
  4. Step 4: Simplify right side
    42,660.64x = 1,234,390,618.52
  5. Step 5: Solve for x
    x = 1,234,390,618.52/42,660.64
  6. Step 6: Final answer
    x = 28,935.12

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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.