Home / 20,422.10-28,184.58-11,470.39

Finding the Fourth Proportional to 20,422.10, 28,184.58 and 11,470.39

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Solution

The fourth proportional to 20,422.10, 28,184.58 and 11,470.39 is: 15,830.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.10 : 28,184.58 = 11,470.39 : x
  2. Step 2: Convert to fraction form
    20,422.10/28,184.58 = 11,470.39/x
  3. Step 3: Cross multiply
    20,422.10x = 28,184.58 × 11,470.39
  4. Step 4: Simplify right side
    20,422.10x = 323,288,124.59
  5. Step 5: Solve for x
    x = 323,288,124.59/20,422.10
  6. Step 6: Final answer
    x = 15,830.31

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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.