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Finding the Fourth Proportional to 8,987, 12,402.06 and 5,261

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Solution

The fourth proportional to 8,987, 12,402.06 and 5,261 is: 7,260.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987 : 12,402.06 = 5,261 : x
  2. Step 2: Convert to fraction form
    8,987/12,402.06 = 5,261/x
  3. Step 3: Cross multiply
    8,987x = 12,402.06 × 5,261
  4. Step 4: Simplify right side
    8,987x = 65,247,237.66
  5. Step 5: Solve for x
    x = 65,247,237.66/8,987
  6. Step 6: Final answer
    x = 7,260.18

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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.