Home / 42,001.20-57,964.80-23,138.40

Finding the Fourth Proportional to 42,001.20, 57,964.80 and 23,138.40

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Solution

The fourth proportional to 42,001.20, 57,964.80 and 23,138.40 is: 31,932.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,001.20 : 57,964.80 = 23,138.40 : x
  2. Step 2: Convert to fraction form
    42,001.20/57,964.80 = 23,138.40/x
  3. Step 3: Cross multiply
    42,001.20x = 57,964.80 × 23,138.40
  4. Step 4: Simplify right side
    42,001.20x = 1,341,212,728.32
  5. Step 5: Solve for x
    x = 1,341,212,728.32/42,001.20
  6. Step 6: Final answer
    x = 31,932.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.