Home / 20,538.66-28,343.61-11,585.34

Finding the Fourth Proportional to 20,538.66, 28,343.61 and 11,585.34

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Solution

The fourth proportional to 20,538.66, 28,343.61 and 11,585.34 is: 15,987.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.66 : 28,343.61 = 11,585.34 : x
  2. Step 2: Convert to fraction form
    20,538.66/28,343.61 = 11,585.34/x
  3. Step 3: Cross multiply
    20,538.66x = 28,343.61 × 11,585.34
  4. Step 4: Simplify right side
    20,538.66x = 328,370,358.68
  5. Step 5: Solve for x
    x = 328,370,358.68/20,538.66
  6. Step 6: Final answer
    x = 15,987.92

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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.