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Finding the Fourth Proportional to 13,889.60, 20,839.20 and 6,097.28

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Solution

The fourth proportional to 13,889.60, 20,839.20 and 6,097.28 is: 9,148.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.60 : 20,839.20 = 6,097.28 : x
  2. Step 2: Convert to fraction form
    13,889.60/20,839.20 = 6,097.28/x
  3. Step 3: Cross multiply
    13,889.60x = 20,839.20 × 6,097.28
  4. Step 4: Simplify right side
    13,889.60x = 127,062,437.38
  5. Step 5: Solve for x
    x = 127,062,437.38/13,889.60
  6. Step 6: Final answer
    x = 9,148.03

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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.