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Finding the Fourth Proportional to 14,187.76, 21,229.80 and 8,347.12

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Solution

The fourth proportional to 14,187.76, 21,229.80 and 8,347.12 is: 12,490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,187.76 : 21,229.80 = 8,347.12 : x
  2. Step 2: Convert to fraction form
    14,187.76/21,229.80 = 8,347.12/x
  3. Step 3: Cross multiply
    14,187.76x = 21,229.80 × 8,347.12
  4. Step 4: Simplify right side
    14,187.76x = 177,207,688.18
  5. Step 5: Solve for x
    x = 177,207,688.18/14,187.76
  6. Step 6: Final answer
    x = 12,490.18

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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.