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Finding the Fourth Proportional to 13,955.52, 20,940.44 and 9,278.76

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Solution

The fourth proportional to 13,955.52, 20,940.44 and 9,278.76 is: 13,922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,955.52 : 20,940.44 = 9,278.76 : x
  2. Step 2: Convert to fraction form
    13,955.52/20,940.44 = 9,278.76/x
  3. Step 3: Cross multiply
    13,955.52x = 20,940.44 × 9,278.76
  4. Step 4: Simplify right side
    13,955.52x = 194,301,317.05
  5. Step 5: Solve for x
    x = 194,301,317.05/13,955.52
  6. Step 6: Final answer
    x = 13,922.90

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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.