Home / 30,612.42-42,247.03-20,385.92

Finding the Fourth Proportional to 30,612.42, 42,247.03 and 20,385.92

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Solution

The fourth proportional to 30,612.42, 42,247.03 and 20,385.92 is: 28,133.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,612.42 : 42,247.03 = 20,385.92 : x
  2. Step 2: Convert to fraction form
    30,612.42/42,247.03 = 20,385.92/x
  3. Step 3: Cross multiply
    30,612.42x = 42,247.03 × 20,385.92
  4. Step 4: Simplify right side
    30,612.42x = 861,244,398.31
  5. Step 5: Solve for x
    x = 861,244,398.31/30,612.42
  6. Step 6: Final answer
    x = 28,133.82

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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.