Home / 42,731.72-64,097.60-13,148.90

Finding the Fourth Proportional to 42,731.72, 64,097.60 and 13,148.90

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Solution

The fourth proportional to 42,731.72, 64,097.60 and 13,148.90 is: 19,723.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,731.72 : 64,097.60 = 13,148.90 : x
  2. Step 2: Convert to fraction form
    42,731.72/64,097.60 = 13,148.90/x
  3. Step 3: Cross multiply
    42,731.72x = 64,097.60 × 13,148.90
  4. Step 4: Simplify right side
    42,731.72x = 842,812,932.64
  5. Step 5: Solve for x
    x = 842,812,932.64/42,731.72
  6. Step 6: Final answer
    x = 19,723.36

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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.