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Finding the Fourth Proportional to 13,963.12, 20,920.06 and 7,374.76

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Solution

The fourth proportional to 13,963.12, 20,920.06 and 7,374.76 is: 11,049.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,963.12 : 20,920.06 = 7,374.76 : x
  2. Step 2: Convert to fraction form
    13,963.12/20,920.06 = 7,374.76/x
  3. Step 3: Cross multiply
    13,963.12x = 20,920.06 × 7,374.76
  4. Step 4: Simplify right side
    13,963.12x = 154,280,421.69
  5. Step 5: Solve for x
    x = 154,280,421.69/13,963.12
  6. Step 6: Final answer
    x = 11,049.14

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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.