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Finding the Fourth Proportional to 13,969.92, 20,962.24 and 9,278.40

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Solution

The fourth proportional to 13,969.92, 20,962.24 and 9,278.40 is: 13,922.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.92 : 20,962.24 = 9,278.40 : x
  2. Step 2: Convert to fraction form
    13,969.92/20,962.24 = 9,278.40/x
  3. Step 3: Cross multiply
    13,969.92x = 20,962.24 × 9,278.40
  4. Step 4: Simplify right side
    13,969.92x = 194,496,047.62
  5. Step 5: Solve for x
    x = 194,496,047.62/13,969.92
  6. Step 6: Final answer
    x = 13,922.49

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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.