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Finding the Fourth Proportional to 28,098.48, 38,772.60 and 15,522.48

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Solution

The fourth proportional to 28,098.48, 38,772.60 and 15,522.48 is: 21,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,098.48 : 38,772.60 = 15,522.48 : x
  2. Step 2: Convert to fraction form
    28,098.48/38,772.60 = 15,522.48/x
  3. Step 3: Cross multiply
    28,098.48x = 38,772.60 × 15,522.48
  4. Step 4: Simplify right side
    28,098.48x = 601,846,908.05
  5. Step 5: Solve for x
    x = 601,846,908.05/28,098.48
  6. Step 6: Final answer
    x = 21,419.20

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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.