Home / 30,781.36-42,472.92-18,201.52

Finding the Fourth Proportional to 30,781.36, 42,472.92 and 18,201.52

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Solution

The fourth proportional to 30,781.36, 42,472.92 and 18,201.52 is: 25,114.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,781.36 : 42,472.92 = 18,201.52 : x
  2. Step 2: Convert to fraction form
    30,781.36/42,472.92 = 18,201.52/x
  3. Step 3: Cross multiply
    30,781.36x = 42,472.92 × 18,201.52
  4. Step 4: Simplify right side
    30,781.36x = 773,071,702.84
  5. Step 5: Solve for x
    x = 773,071,702.84/30,781.36
  6. Step 6: Final answer
    x = 25,114.93

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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.