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Finding the Fourth Proportional to 8,656.61, 11,941.85 and 8,321.27

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Solution

The fourth proportional to 8,656.61, 11,941.85 and 8,321.27 is: 11,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.61 : 11,941.85 = 8,321.27 : x
  2. Step 2: Convert to fraction form
    8,656.61/11,941.85 = 8,321.27/x
  3. Step 3: Cross multiply
    8,656.61x = 11,941.85 × 8,321.27
  4. Step 4: Simplify right side
    8,656.61x = 99,371,319.24
  5. Step 5: Solve for x
    x = 99,371,319.24/8,656.61
  6. Step 6: Final answer
    x = 11,479.25

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1.5x scale

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.