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Finding the Fourth Proportional to 10,662, 15,928.32 and 8,912.40

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Solution

The fourth proportional to 10,662, 15,928.32 and 8,912.40 is: 13,314.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,662 : 15,928.32 = 8,912.40 : x
  2. Step 2: Convert to fraction form
    10,662/15,928.32 = 8,912.40/x
  3. Step 3: Cross multiply
    10,662x = 15,928.32 × 8,912.40
  4. Step 4: Simplify right side
    10,662x = 141,959,559.17
  5. Step 5: Solve for x
    x = 141,959,559.17/10,662
  6. Step 6: Final answer
    x = 13,314.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.