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Finding the Fourth Proportional to 8,684.55, 11,985.98 and 7,356.15

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Solution

The fourth proportional to 8,684.55, 11,985.98 and 7,356.15 is: 10,152.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,684.55 : 11,985.98 = 7,356.15 : x
  2. Step 2: Convert to fraction form
    8,684.55/11,985.98 = 7,356.15/x
  3. Step 3: Cross multiply
    8,684.55x = 11,985.98 × 7,356.15
  4. Step 4: Simplify right side
    8,684.55x = 88,170,630.00
  5. Step 5: Solve for x
    x = 88,170,630.00/8,684.55
  6. Step 6: Final answer
    x = 10,152.58

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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.