Home / 20,806.10-28,712.50-11,374.82

Finding the Fourth Proportional to 20,806.10, 28,712.50 and 11,374.82

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Solution

The fourth proportional to 20,806.10, 28,712.50 and 11,374.82 is: 15,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.10 : 28,712.50 = 11,374.82 : x
  2. Step 2: Convert to fraction form
    20,806.10/28,712.50 = 11,374.82/x
  3. Step 3: Cross multiply
    20,806.10x = 28,712.50 × 11,374.82
  4. Step 4: Simplify right side
    20,806.10x = 326,599,519.25
  5. Step 5: Solve for x
    x = 326,599,519.25/20,806.10
  6. Step 6: Final answer
    x = 15,697.30

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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.