Home / 20,806.13-28,712.55-11,374.69

Finding the Fourth Proportional to 20,806.13, 28,712.55 and 11,374.69

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Solution

The fourth proportional to 20,806.13, 28,712.55 and 11,374.69 is: 15,697.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.13 : 28,712.55 = 11,374.69 : x
  2. Step 2: Convert to fraction form
    20,806.13/28,712.55 = 11,374.69/x
  3. Step 3: Cross multiply
    20,806.13x = 28,712.55 × 11,374.69
  4. Step 4: Simplify right side
    20,806.13x = 326,596,326.23
  5. Step 5: Solve for x
    x = 326,596,326.23/20,806.13
  6. Step 6: Final answer
    x = 15,697.12

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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.