Home / 30,557.75-42,156.33-21,612.92

Finding the Fourth Proportional to 30,557.75, 42,156.33 and 21,612.92

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Solution

The fourth proportional to 30,557.75, 42,156.33 and 21,612.92 is: 29,816.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,557.75 : 42,156.33 = 21,612.92 : x
  2. Step 2: Convert to fraction form
    30,557.75/42,156.33 = 21,612.92/x
  3. Step 3: Cross multiply
    30,557.75x = 42,156.33 × 21,612.92
  4. Step 4: Simplify right side
    30,557.75x = 911,121,387.78
  5. Step 5: Solve for x
    x = 911,121,387.78/30,557.75
  6. Step 6: Final answer
    x = 29,816.38

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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.