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Finding the Fourth Proportional to 8,689.25, 13,001.07 and 5,386.88

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Solution

The fourth proportional to 8,689.25, 13,001.07 and 5,386.88 is: 8,059.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.25 : 13,001.07 = 5,386.88 : x
  2. Step 2: Convert to fraction form
    8,689.25/13,001.07 = 5,386.88/x
  3. Step 3: Cross multiply
    8,689.25x = 13,001.07 × 5,386.88
  4. Step 4: Simplify right side
    8,689.25x = 70,035,203.96
  5. Step 5: Solve for x
    x = 70,035,203.96/8,689.25
  6. Step 6: Final answer
    x = 8,059.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.