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Finding the Fourth Proportional to 8,718.81, 12,044.22 and 7,931.49

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Solution

The fourth proportional to 8,718.81, 12,044.22 and 7,931.49 is: 10,956.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.81 : 12,044.22 = 7,931.49 : x
  2. Step 2: Convert to fraction form
    8,718.81/12,044.22 = 7,931.49/x
  3. Step 3: Cross multiply
    8,718.81x = 12,044.22 × 7,931.49
  4. Step 4: Simplify right side
    8,718.81x = 95,528,610.49
  5. Step 5: Solve for x
    x = 95,528,610.49/8,718.81
  6. Step 6: Final answer
    x = 10,956.61

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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.