Home / 42,691.36-64,023.20-14,220.72

Finding the Fourth Proportional to 42,691.36, 64,023.20 and 14,220.72

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Solution

The fourth proportional to 42,691.36, 64,023.20 and 14,220.72 is: 21,326.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,691.36 : 64,023.20 = 14,220.72 : x
  2. Step 2: Convert to fraction form
    42,691.36/64,023.20 = 14,220.72/x
  3. Step 3: Cross multiply
    42,691.36x = 64,023.20 × 14,220.72
  4. Step 4: Simplify right side
    42,691.36x = 910,456,000.70
  5. Step 5: Solve for x
    x = 910,456,000.70/42,691.36
  6. Step 6: Final answer
    x = 21,326.47

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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.