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Finding the Fourth Proportional to 15,492.01, 21,378.92 and 8,778.92

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Solution

The fourth proportional to 15,492.01, 21,378.92 and 8,778.92 is: 12,114.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.01 : 21,378.92 = 8,778.92 : x
  2. Step 2: Convert to fraction form
    15,492.01/21,378.92 = 8,778.92/x
  3. Step 3: Cross multiply
    15,492.01x = 21,378.92 × 8,778.92
  4. Step 4: Simplify right side
    15,492.01x = 187,683,677.58
  5. Step 5: Solve for x
    x = 187,683,677.58/15,492.01
  6. Step 6: Final answer
    x = 12,114.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.