Home / 13,515.60-20,248.56-7,971.96

Finding the Fourth Proportional to 13,515.60, 20,248.56 and 7,971.96

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Solution

The fourth proportional to 13,515.60, 20,248.56 and 7,971.96 is: 11,943.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.60 : 20,248.56 = 7,971.96 : x
  2. Step 2: Convert to fraction form
    13,515.60/20,248.56 = 7,971.96/x
  3. Step 3: Cross multiply
    13,515.60x = 20,248.56 × 7,971.96
  4. Step 4: Simplify right side
    13,515.60x = 161,420,710.38
  5. Step 5: Solve for x
    x = 161,420,710.38/13,515.60
  6. Step 6: Final answer
    x = 11,943.29

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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.