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Finding the Fourth Proportional to 8,628.75, 12,947.45 and 3,948.75

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Solution

The fourth proportional to 8,628.75, 12,947.45 and 3,948.75 is: 5,925.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.75 : 12,947.45 = 3,948.75 : x
  2. Step 2: Convert to fraction form
    8,628.75/12,947.45 = 3,948.75/x
  3. Step 3: Cross multiply
    8,628.75x = 12,947.45 × 3,948.75
  4. Step 4: Simplify right side
    8,628.75x = 51,126,223.44
  5. Step 5: Solve for x
    x = 51,126,223.44/8,628.75
  6. Step 6: Final answer
    x = 5,925.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.