Home / 20,426.88-28,162.88-13,342.08

Finding the Fourth Proportional to 20,426.88, 28,162.88 and 13,342.08

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Solution

The fourth proportional to 20,426.88, 28,162.88 and 13,342.08 is: 18,394.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.88 : 28,162.88 = 13,342.08 : x
  2. Step 2: Convert to fraction form
    20,426.88/28,162.88 = 13,342.08/x
  3. Step 3: Cross multiply
    20,426.88x = 28,162.88 × 13,342.08
  4. Step 4: Simplify right side
    20,426.88x = 375,751,397.99
  5. Step 5: Solve for x
    x = 375,751,397.99/20,426.88
  6. Step 6: Final answer
    x = 18,394.95

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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.