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Finding the Fourth Proportional to 9,959.46, 13,746.21 and 5,711.21

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Solution

The fourth proportional to 9,959.46, 13,746.21 and 5,711.21 is: 7,882.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,959.46 : 13,746.21 = 5,711.21 : x
  2. Step 2: Convert to fraction form
    9,959.46/13,746.21 = 5,711.21/x
  3. Step 3: Cross multiply
    9,959.46x = 13,746.21 × 5,711.21
  4. Step 4: Simplify right side
    9,959.46x = 78,507,453.41
  5. Step 5: Solve for x
    x = 78,507,453.41/9,959.46
  6. Step 6: Final answer
    x = 7,882.70

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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.