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Finding the Fourth Proportional to 15,120.64, 22,680.64 and 8,103.04

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Solution

The fourth proportional to 15,120.64, 22,680.64 and 8,103.04 is: 12,154.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.64 : 22,680.64 = 8,103.04 : x
  2. Step 2: Convert to fraction form
    15,120.64/22,680.64 = 8,103.04/x
  3. Step 3: Cross multiply
    15,120.64x = 22,680.64 × 8,103.04
  4. Step 4: Simplify right side
    15,120.64x = 183,782,133.15
  5. Step 5: Solve for x
    x = 183,782,133.15/15,120.64
  6. Step 6: Final answer
    x = 12,154.39

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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.