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Finding the Fourth Proportional to 8,959.10, 12,330.92 and 7,889.88

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Solution

The fourth proportional to 8,959.10, 12,330.92 and 7,889.88 is: 10,859.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.10 : 12,330.92 = 7,889.88 : x
  2. Step 2: Convert to fraction form
    8,959.10/12,330.92 = 7,889.88/x
  3. Step 3: Cross multiply
    8,959.10x = 12,330.92 × 7,889.88
  4. Step 4: Simplify right side
    8,959.10x = 97,289,377.99
  5. Step 5: Solve for x
    x = 97,289,377.99/8,959.10
  6. Step 6: Final answer
    x = 10,859.28

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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.