Home / 20,913.20-28,858.92-11,479.76

Finding the Fourth Proportional to 20,913.20, 28,858.92 and 11,479.76

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Solution

The fourth proportional to 20,913.20, 28,858.92 and 11,479.76 is: 15,841.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.20 : 28,858.92 = 11,479.76 : x
  2. Step 2: Convert to fraction form
    20,913.20/28,858.92 = 11,479.76/x
  3. Step 3: Cross multiply
    20,913.20x = 28,858.92 × 11,479.76
  4. Step 4: Simplify right side
    20,913.20x = 331,293,475.46
  5. Step 5: Solve for x
    x = 331,293,475.46/20,913.20
  6. Step 6: Final answer
    x = 15,841.36

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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.