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Finding the Fourth Proportional to 8,961.13, 12,333.71 and 7,891.91

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Solution

The fourth proportional to 8,961.13, 12,333.71 and 7,891.91 is: 10,862.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.13 : 12,333.71 = 7,891.91 : x
  2. Step 2: Convert to fraction form
    8,961.13/12,333.71 = 7,891.91/x
  3. Step 3: Cross multiply
    8,961.13x = 12,333.71 × 7,891.91
  4. Step 4: Simplify right side
    8,961.13x = 97,336,533.60
  5. Step 5: Solve for x
    x = 97,336,533.60/8,961.13
  6. Step 6: Final answer
    x = 10,862.08

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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.