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Finding the Fourth Proportional to 9,689.20, 14,512.20 and 7,961.20

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Solution

The fourth proportional to 9,689.20, 14,512.20 and 7,961.20 is: 11,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,689.20 : 14,512.20 = 7,961.20 : x
  2. Step 2: Convert to fraction form
    9,689.20/14,512.20 = 7,961.20/x
  3. Step 3: Cross multiply
    9,689.20x = 14,512.20 × 7,961.20
  4. Step 4: Simplify right side
    9,689.20x = 115,534,526.64
  5. Step 5: Solve for x
    x = 115,534,526.64/9,689.20
  6. Step 6: Final answer
    x = 11,924.05

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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.