Home / 20,509.80-28,306.26-11,559.12

Finding the Fourth Proportional to 20,509.80, 28,306.26 and 11,559.12

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Solution

The fourth proportional to 20,509.80, 28,306.26 and 11,559.12 is: 15,953.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.80 : 28,306.26 = 11,559.12 : x
  2. Step 2: Convert to fraction form
    20,509.80/28,306.26 = 11,559.12/x
  3. Step 3: Cross multiply
    20,509.80x = 28,306.26 × 11,559.12
  4. Step 4: Simplify right side
    20,509.80x = 327,195,456.09
  5. Step 5: Solve for x
    x = 327,195,456.09/20,509.80
  6. Step 6: Final answer
    x = 15,953.13

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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.