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Finding the Fourth Proportional to 8,955.50, 12,355.03 and 5,177.96

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Solution

The fourth proportional to 8,955.50, 12,355.03 and 5,177.96 is: 7,143.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,955.50 : 12,355.03 = 5,177.96 : x
  2. Step 2: Convert to fraction form
    8,955.50/12,355.03 = 5,177.96/x
  3. Step 3: Cross multiply
    8,955.50x = 12,355.03 × 5,177.96
  4. Step 4: Simplify right side
    8,955.50x = 63,973,842.17
  5. Step 5: Solve for x
    x = 63,973,842.17/8,955.50
  6. Step 6: Final answer
    x = 7,143.53

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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.