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Finding the Fourth Proportional to 15,459.44, 21,334.02 and 8,385.80

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Solution

The fourth proportional to 15,459.44, 21,334.02 and 8,385.80 is: 11,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.44 : 21,334.02 = 8,385.80 : x
  2. Step 2: Convert to fraction form
    15,459.44/21,334.02 = 8,385.80/x
  3. Step 3: Cross multiply
    15,459.44x = 21,334.02 × 8,385.80
  4. Step 4: Simplify right side
    15,459.44x = 178,902,824.92
  5. Step 5: Solve for x
    x = 178,902,824.92/15,459.44
  6. Step 6: Final answer
    x = 11,572.40

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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.