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Finding the Fourth Proportional to 9,959.46, 13,743.90 and 5,711.28

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Solution

The fourth proportional to 9,959.46, 13,743.90 and 5,711.28 is: 7,881.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,959.46 : 13,743.90 = 5,711.28 : x
  2. Step 2: Convert to fraction form
    9,959.46/13,743.90 = 5,711.28/x
  3. Step 3: Cross multiply
    9,959.46x = 13,743.90 × 5,711.28
  4. Step 4: Simplify right side
    9,959.46x = 78,495,261.19
  5. Step 5: Solve for x
    x = 78,495,261.19/9,959.46
  6. Step 6: Final answer
    x = 7,881.48

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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.