Home / 13,712.29-18,923.70-7,744.21

Finding the Fourth Proportional to 13,712.29, 18,923.70 and 7,744.21

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Solution

The fourth proportional to 13,712.29, 18,923.70 and 7,744.21 is: 10,687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.29 : 18,923.70 = 7,744.21 : x
  2. Step 2: Convert to fraction form
    13,712.29/18,923.70 = 7,744.21/x
  3. Step 3: Cross multiply
    13,712.29x = 18,923.70 × 7,744.21
  4. Step 4: Simplify right side
    13,712.29x = 146,549,106.78
  5. Step 5: Solve for x
    x = 146,549,106.78/13,712.29
  6. Step 6: Final answer
    x = 10,687.43

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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.