Home / 13,711.82-18,921.21-7,744.07

Finding the Fourth Proportional to 13,711.82, 18,921.21 and 7,744.07

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Solution

The fourth proportional to 13,711.82, 18,921.21 and 7,744.07 is: 10,686.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.82 : 18,921.21 = 7,744.07 : x
  2. Step 2: Convert to fraction form
    13,711.82/18,921.21 = 7,744.07/x
  3. Step 3: Cross multiply
    13,711.82x = 18,921.21 × 7,744.07
  4. Step 4: Simplify right side
    13,711.82x = 146,527,080.12
  5. Step 5: Solve for x
    x = 146,527,080.12/13,711.82
  6. Step 6: Final answer
    x = 10,686.19

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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.