Home / 28,129.68-38,817.90-15,382.44

Finding the Fourth Proportional to 28,129.68, 38,817.90 and 15,382.44

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Solution

The fourth proportional to 28,129.68, 38,817.90 and 15,382.44 is: 21,227.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.68 : 38,817.90 = 15,382.44 : x
  2. Step 2: Convert to fraction form
    28,129.68/38,817.90 = 15,382.44/x
  3. Step 3: Cross multiply
    28,129.68x = 38,817.90 × 15,382.44
  4. Step 4: Simplify right side
    28,129.68x = 597,114,017.68
  5. Step 5: Solve for x
    x = 597,114,017.68/28,129.68
  6. Step 6: Final answer
    x = 21,227.19

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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.