Home / 28,156.96-42,251.28-19,398.88

Finding the Fourth Proportional to 28,156.96, 42,251.28 and 19,398.88

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Solution

The fourth proportional to 28,156.96, 42,251.28 and 19,398.88 is: 29,109.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.96 : 42,251.28 = 19,398.88 : x
  2. Step 2: Convert to fraction form
    28,156.96/42,251.28 = 19,398.88/x
  3. Step 3: Cross multiply
    28,156.96x = 42,251.28 × 19,398.88
  4. Step 4: Simplify right side
    28,156.96x = 819,627,510.57
  5. Step 5: Solve for x
    x = 819,627,510.57/28,156.96
  6. Step 6: Final answer
    x = 29,109.23

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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.