Home / 13,750.80-18,972.96-7,781.18

Finding the Fourth Proportional to 13,750.80, 18,972.96 and 7,781.18

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Solution

The fourth proportional to 13,750.80, 18,972.96 and 7,781.18 is: 10,736.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.80 : 18,972.96 = 7,781.18 : x
  2. Step 2: Convert to fraction form
    13,750.80/18,972.96 = 7,781.18/x
  3. Step 3: Cross multiply
    13,750.80x = 18,972.96 × 7,781.18
  4. Step 4: Simplify right side
    13,750.80x = 147,632,016.89
  5. Step 5: Solve for x
    x = 147,632,016.89/13,750.80
  6. Step 6: Final answer
    x = 10,736.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.