Home / 28,138.28-38,828.22-15,562.76

Finding the Fourth Proportional to 28,138.28, 38,828.22 and 15,562.76

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Solution

The fourth proportional to 28,138.28, 38,828.22 and 15,562.76 is: 21,475.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.28 : 38,828.22 = 15,562.76 : x
  2. Step 2: Convert to fraction form
    28,138.28/38,828.22 = 15,562.76/x
  3. Step 3: Cross multiply
    28,138.28x = 38,828.22 × 15,562.76
  4. Step 4: Simplify right side
    28,138.28x = 604,274,269.09
  5. Step 5: Solve for x
    x = 604,274,269.09/28,138.28
  6. Step 6: Final answer
    x = 21,475.17

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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.