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Finding the Fourth Proportional to 9,863.55, 13,611.82 and 5,387.34

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Solution

The fourth proportional to 9,863.55, 13,611.82 and 5,387.34 is: 7,434.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,863.55 : 13,611.82 = 5,387.34 : x
  2. Step 2: Convert to fraction form
    9,863.55/13,611.82 = 5,387.34/x
  3. Step 3: Cross multiply
    9,863.55x = 13,611.82 × 5,387.34
  4. Step 4: Simplify right side
    9,863.55x = 73,331,502.36
  5. Step 5: Solve for x
    x = 73,331,502.36/9,863.55
  6. Step 6: Final answer
    x = 7,434.60

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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.