Home / 20,373.39-28,116.05-11,421.08

Finding the Fourth Proportional to 20,373.39, 28,116.05 and 11,421.08

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Solution

The fourth proportional to 20,373.39, 28,116.05 and 11,421.08 is: 15,761.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.39 : 28,116.05 = 11,421.08 : x
  2. Step 2: Convert to fraction form
    20,373.39/28,116.05 = 11,421.08/x
  3. Step 3: Cross multiply
    20,373.39x = 28,116.05 × 11,421.08
  4. Step 4: Simplify right side
    20,373.39x = 321,115,458.65
  5. Step 5: Solve for x
    x = 321,115,458.65/20,373.39
  6. Step 6: Final answer
    x = 15,761.51

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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.