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Finding the Fourth Proportional to 9,271.13, 12,789.71 and 8,913.07

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Solution

The fourth proportional to 9,271.13, 12,789.71 and 8,913.07 is: 12,295.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,271.13 : 12,789.71 = 8,913.07 : x
  2. Step 2: Convert to fraction form
    9,271.13/12,789.71 = 8,913.07/x
  3. Step 3: Cross multiply
    9,271.13x = 12,789.71 × 8,913.07
  4. Step 4: Simplify right side
    9,271.13x = 113,995,503.97
  5. Step 5: Solve for x
    x = 113,995,503.97/9,271.13
  6. Step 6: Final answer
    x = 12,295.76

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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.