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Finding the Fourth Proportional to 7,718.71, 10,640.67 and 5,061.51

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Solution

The fourth proportional to 7,718.71, 10,640.67 and 5,061.51 is: 6,977.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,718.71 : 10,640.67 = 5,061.51 : x
  2. Step 2: Convert to fraction form
    7,718.71/10,640.67 = 5,061.51/x
  3. Step 3: Cross multiply
    7,718.71x = 10,640.67 × 5,061.51
  4. Step 4: Simplify right side
    7,718.71x = 53,857,857.61
  5. Step 5: Solve for x
    x = 53,857,857.61/7,718.71
  6. Step 6: Final answer
    x = 6,977.57

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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.