Home / 9,940.71-13,718.21-5,691.84

Finding the Fourth Proportional to 9,940.71, 13,718.21 and 5,691.84

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Solution

The fourth proportional to 9,940.71, 13,718.21 and 5,691.84 is: 7,854.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,940.71 : 13,718.21 = 5,691.84 : x
  2. Step 2: Convert to fraction form
    9,940.71/13,718.21 = 5,691.84/x
  3. Step 3: Cross multiply
    9,940.71x = 13,718.21 × 5,691.84
  4. Step 4: Simplify right side
    9,940.71x = 78,081,822.11
  5. Step 5: Solve for x
    x = 78,081,822.11/9,940.71
  6. Step 6: Final answer
    x = 7,854.75

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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.