Home / 20,806.28-28,712.91-11,374.84

Finding the Fourth Proportional to 20,806.28, 28,712.91 and 11,374.84

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Solution

The fourth proportional to 20,806.28, 28,712.91 and 11,374.84 is: 15,697.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.28 : 28,712.91 = 11,374.84 : x
  2. Step 2: Convert to fraction form
    20,806.28/28,712.91 = 11,374.84/x
  3. Step 3: Cross multiply
    20,806.28x = 28,712.91 × 11,374.84
  4. Step 4: Simplify right side
    20,806.28x = 326,604,757.18
  5. Step 5: Solve for x
    x = 326,604,757.18/20,806.28
  6. Step 6: Final answer
    x = 15,697.41

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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.