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Finding the Fourth Proportional to 12,641.76, 18,962.56 and 3,281.76

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Solution

The fourth proportional to 12,641.76, 18,962.56 and 3,281.76 is: 4,922.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.76 : 18,962.56 = 3,281.76 : x
  2. Step 2: Convert to fraction form
    12,641.76/18,962.56 = 3,281.76/x
  3. Step 3: Cross multiply
    12,641.76x = 18,962.56 × 3,281.76
  4. Step 4: Simplify right side
    12,641.76x = 62,230,570.91
  5. Step 5: Solve for x
    x = 62,230,570.91/12,641.76
  6. Step 6: Final answer
    x = 4,922.62

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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.