Home / 13,721.23-20,565.43-6,318.23

Finding the Fourth Proportional to 13,721.23, 20,565.43 and 6,318.23

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Solution

The fourth proportional to 13,721.23, 20,565.43 and 6,318.23 is: 9,469.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.23 : 20,565.43 = 6,318.23 : x
  2. Step 2: Convert to fraction form
    13,721.23/20,565.43 = 6,318.23/x
  3. Step 3: Cross multiply
    13,721.23x = 20,565.43 × 6,318.23
  4. Step 4: Simplify right side
    13,721.23x = 129,937,116.79
  5. Step 5: Solve for x
    x = 129,937,116.79/13,721.23
  6. Step 6: Final answer
    x = 9,469.79

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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.