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Finding the Fourth Proportional to 10,955, 15,117.90 and 5,987

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Solution

The fourth proportional to 10,955, 15,117.90 and 5,987 is: 8,262.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955 : 15,117.90 = 5,987 : x
  2. Step 2: Convert to fraction form
    10,955/15,117.90 = 5,987/x
  3. Step 3: Cross multiply
    10,955x = 15,117.90 × 5,987
  4. Step 4: Simplify right side
    10,955x = 90,510,867.30
  5. Step 5: Solve for x
    x = 90,510,867.30/10,955
  6. Step 6: Final answer
    x = 8,262.06

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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.