Home / 28,298.10-42,398.55-18,432.30

Finding the Fourth Proportional to 28,298.10, 42,398.55 and 18,432.30

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Solution

The fourth proportional to 28,298.10, 42,398.55 and 18,432.30 is: 27,616.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,298.10 : 42,398.55 = 18,432.30 : x
  2. Step 2: Convert to fraction form
    28,298.10/42,398.55 = 18,432.30/x
  3. Step 3: Cross multiply
    28,298.10x = 42,398.55 × 18,432.30
  4. Step 4: Simplify right side
    28,298.10x = 781,502,793.17
  5. Step 5: Solve for x
    x = 781,502,793.17/28,298.10
  6. Step 6: Final answer
    x = 27,616.79

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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.