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Finding the Fourth Proportional to 8,854.60, 12,220.53 and 5,719.90

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Solution

The fourth proportional to 8,854.60, 12,220.53 and 5,719.90 is: 7,894.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,854.60 : 12,220.53 = 5,719.90 : x
  2. Step 2: Convert to fraction form
    8,854.60/12,220.53 = 5,719.90/x
  3. Step 3: Cross multiply
    8,854.60x = 12,220.53 × 5,719.90
  4. Step 4: Simplify right side
    8,854.60x = 69,900,209.55
  5. Step 5: Solve for x
    x = 69,900,209.55/8,854.60
  6. Step 6: Final answer
    x = 7,894.23

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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.