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Finding the Fourth Proportional to 28,060.82, 38,724.75 and 15,314.82

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Solution

The fourth proportional to 28,060.82, 38,724.75 and 15,314.82 is: 21,134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,060.82 : 38,724.75 = 15,314.82 : x
  2. Step 2: Convert to fraction form
    28,060.82/38,724.75 = 15,314.82/x
  3. Step 3: Cross multiply
    28,060.82x = 38,724.75 × 15,314.82
  4. Step 4: Simplify right side
    28,060.82x = 593,062,648.40
  5. Step 5: Solve for x
    x = 593,062,648.40/28,060.82
  6. Step 6: Final answer
    x = 21,134.90

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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.