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Finding the Fourth Proportional to 8,963.66, 12,370.25 and 4,985.15

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Solution

The fourth proportional to 8,963.66, 12,370.25 and 4,985.15 is: 6,879.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,963.66 : 12,370.25 = 4,985.15 : x
  2. Step 2: Convert to fraction form
    8,963.66/12,370.25 = 4,985.15/x
  3. Step 3: Cross multiply
    8,963.66x = 12,370.25 × 4,985.15
  4. Step 4: Simplify right side
    8,963.66x = 61,667,502.40
  5. Step 5: Solve for x
    x = 61,667,502.40/8,963.66
  6. Step 6: Final answer
    x = 6,879.72

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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.