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Finding the Fourth Proportional to 15,138.60, 22,680.90 and 7,330.20

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Solution

The fourth proportional to 15,138.60, 22,680.90 and 7,330.20 is: 10,982.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.60 : 22,680.90 = 7,330.20 : x
  2. Step 2: Convert to fraction form
    15,138.60/22,680.90 = 7,330.20/x
  3. Step 3: Cross multiply
    15,138.60x = 22,680.90 × 7,330.20
  4. Step 4: Simplify right side
    15,138.60x = 166,255,533.18
  5. Step 5: Solve for x
    x = 166,255,533.18/15,138.60
  6. Step 6: Final answer
    x = 10,982.23

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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.