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Finding the Fourth Proportional to 9,915.12, 14,791.68 and 9,208.08

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Solution

The fourth proportional to 9,915.12, 14,791.68 and 9,208.08 is: 13,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.12 : 14,791.68 = 9,208.08 : x
  2. Step 2: Convert to fraction form
    9,915.12/14,791.68 = 9,208.08/x
  3. Step 3: Cross multiply
    9,915.12x = 14,791.68 × 9,208.08
  4. Step 4: Simplify right side
    9,915.12x = 136,202,972.77
  5. Step 5: Solve for x
    x = 136,202,972.77/9,915.12
  6. Step 6: Final answer
    x = 13,736.90

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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.