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Finding the Fourth Proportional to 15,213.60, 22,820.40 and 12,807.90

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Solution

The fourth proportional to 15,213.60, 22,820.40 and 12,807.90 is: 19,211.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.60 : 22,820.40 = 12,807.90 : x
  2. Step 2: Convert to fraction form
    15,213.60/22,820.40 = 12,807.90/x
  3. Step 3: Cross multiply
    15,213.60x = 22,820.40 × 12,807.90
  4. Step 4: Simplify right side
    15,213.60x = 292,281,401.16
  5. Step 5: Solve for x
    x = 292,281,401.16/15,213.60
  6. Step 6: Final answer
    x = 19,211.85

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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.