Home / 28,129.74-38,817.78-15,382.62

Finding the Fourth Proportional to 28,129.74, 38,817.78 and 15,382.62

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Solution

The fourth proportional to 28,129.74, 38,817.78 and 15,382.62 is: 21,227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.74 : 38,817.78 = 15,382.62 : x
  2. Step 2: Convert to fraction form
    28,129.74/38,817.78 = 15,382.62/x
  3. Step 3: Cross multiply
    28,129.74x = 38,817.78 × 15,382.62
  4. Step 4: Simplify right side
    28,129.74x = 597,119,158.98
  5. Step 5: Solve for x
    x = 597,119,158.98/28,129.74
  6. Step 6: Final answer
    x = 21,227.33

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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.