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Finding the Fourth Proportional to 8,689.78, 13,036.55 and 3,495.66

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Solution

The fourth proportional to 8,689.78, 13,036.55 and 3,495.66 is: 5,244.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.78 : 13,036.55 = 3,495.66 : x
  2. Step 2: Convert to fraction form
    8,689.78/13,036.55 = 3,495.66/x
  3. Step 3: Cross multiply
    8,689.78x = 13,036.55 × 3,495.66
  4. Step 4: Simplify right side
    8,689.78x = 45,571,280.01
  5. Step 5: Solve for x
    x = 45,571,280.01/8,689.78
  6. Step 6: Final answer
    x = 5,244.24

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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.