Home / 12,492.20-18,719.10-8,383.40

Finding the Fourth Proportional to 12,492.20, 18,719.10 and 8,383.40

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Solution

The fourth proportional to 12,492.20, 18,719.10 and 8,383.40 is: 12,562.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.20 : 18,719.10 = 8,383.40 : x
  2. Step 2: Convert to fraction form
    12,492.20/18,719.10 = 8,383.40/x
  3. Step 3: Cross multiply
    12,492.20x = 18,719.10 × 8,383.40
  4. Step 4: Simplify right side
    12,492.20x = 156,929,702.94
  5. Step 5: Solve for x
    x = 156,929,702.94/12,492.20
  6. Step 6: Final answer
    x = 12,562.22

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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.