Home / 20,538.58-28,342.55-11,585.75

Finding the Fourth Proportional to 20,538.58, 28,342.55 and 11,585.75

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Solution

The fourth proportional to 20,538.58, 28,342.55 and 11,585.75 is: 15,987.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.58 : 28,342.55 = 11,585.75 : x
  2. Step 2: Convert to fraction form
    20,538.58/28,342.55 = 11,585.75/x
  3. Step 3: Cross multiply
    20,538.58x = 28,342.55 × 11,585.75
  4. Step 4: Simplify right side
    20,538.58x = 328,369,698.66
  5. Step 5: Solve for x
    x = 328,369,698.66/20,538.58
  6. Step 6: Final answer
    x = 15,987.95

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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.