Home / 8,712.29-11,995.65-7,689.20

Finding the Fourth Proportional to 8,712.29, 11,995.65 and 7,689.20

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Solution

The fourth proportional to 8,712.29, 11,995.65 and 7,689.20 is: 10,586.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.29 : 11,995.65 = 7,689.20 : x
  2. Step 2: Convert to fraction form
    8,712.29/11,995.65 = 7,689.20/x
  3. Step 3: Cross multiply
    8,712.29x = 11,995.65 × 7,689.20
  4. Step 4: Simplify right side
    8,712.29x = 92,236,892.00
  5. Step 5: Solve for x
    x = 92,236,892.00/8,712.29
  6. Step 6: Final answer
    x = 10,586.98

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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.