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Finding the Fourth Proportional to 8,718.93, 12,032.42 and 5,185.71

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Solution

The fourth proportional to 8,718.93, 12,032.42 and 5,185.71 is: 7,156.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.93 : 12,032.42 = 5,185.71 : x
  2. Step 2: Convert to fraction form
    8,718.93/12,032.42 = 5,185.71/x
  3. Step 3: Cross multiply
    8,718.93x = 12,032.42 × 5,185.71
  4. Step 4: Simplify right side
    8,718.93x = 62,396,614.79
  5. Step 5: Solve for x
    x = 62,396,614.79/8,718.93
  6. Step 6: Final answer
    x = 7,156.45

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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.