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Finding the Fourth Proportional to 12,492.40, 18,719.40 and 10,841.20

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Solution

The fourth proportional to 12,492.40, 18,719.40 and 10,841.20 is: 16,245.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.40 : 18,719.40 = 10,841.20 : x
  2. Step 2: Convert to fraction form
    12,492.40/18,719.40 = 10,841.20/x
  3. Step 3: Cross multiply
    12,492.40x = 18,719.40 × 10,841.20
  4. Step 4: Simplify right side
    12,492.40x = 202,940,759.28
  5. Step 5: Solve for x
    x = 202,940,759.28/12,492.40
  6. Step 6: Final answer
    x = 16,245.14

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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.