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Finding the Fourth Proportional to 28,122.87, 38,807.90 and 15,546.87

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Solution

The fourth proportional to 28,122.87, 38,807.90 and 15,546.87 is: 21,453.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.87 : 38,807.90 = 15,546.87 : x
  2. Step 2: Convert to fraction form
    28,122.87/38,807.90 = 15,546.87/x
  3. Step 3: Cross multiply
    28,122.87x = 38,807.90 × 15,546.87
  4. Step 4: Simplify right side
    28,122.87x = 603,341,298.54
  5. Step 5: Solve for x
    x = 603,341,298.54/28,122.87
  6. Step 6: Final answer
    x = 21,453.76

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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.