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Finding the Fourth Proportional to 28,615.52, 42,912.48 and 13,819.52

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Solution

The fourth proportional to 28,615.52, 42,912.48 and 13,819.52 is: 20,724.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.52 : 42,912.48 = 13,819.52 : x
  2. Step 2: Convert to fraction form
    28,615.52/42,912.48 = 13,819.52/x
  3. Step 3: Cross multiply
    28,615.52x = 42,912.48 × 13,819.52
  4. Step 4: Simplify right side
    28,615.52x = 593,029,875.61
  5. Step 5: Solve for x
    x = 593,029,875.61/28,615.52
  6. Step 6: Final answer
    x = 20,724.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.