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Finding the Fourth Proportional to 9,862.26, 13,609.86 and 5,386

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Solution

The fourth proportional to 9,862.26, 13,609.86 and 5,386 is: 7,432.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,862.26 : 13,609.86 = 5,386 : x
  2. Step 2: Convert to fraction form
    9,862.26/13,609.86 = 5,386/x
  3. Step 3: Cross multiply
    9,862.26x = 13,609.86 × 5,386
  4. Step 4: Simplify right side
    9,862.26x = 73,302,705.96
  5. Step 5: Solve for x
    x = 73,302,705.96/9,862.26
  6. Step 6: Final answer
    x = 7,432.65

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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.