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Finding the Fourth Proportional to 10,391.00, 15,591.06 and 5,459.49

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Solution

The fourth proportional to 10,391.00, 15,591.06 and 5,459.49 is: 8,191.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,391.00 : 15,591.06 = 5,459.49 : x
  2. Step 2: Convert to fraction form
    10,391.00/15,591.06 = 5,459.49/x
  3. Step 3: Cross multiply
    10,391.00x = 15,591.06 × 5,459.49
  4. Step 4: Simplify right side
    10,391.00x = 85,119,236.16
  5. Step 5: Solve for x
    x = 85,119,236.16/10,391.00
  6. Step 6: Final answer
    x = 8,191.63

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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.