Home / 20,420.82-28,159.17-16,165.08

Finding the Fourth Proportional to 20,420.82, 28,159.17 and 16,165.08

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Solution

The fourth proportional to 20,420.82, 28,159.17 and 16,165.08 is: 22,290.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.82 : 28,159.17 = 16,165.08 : x
  2. Step 2: Convert to fraction form
    20,420.82/28,159.17 = 16,165.08/x
  3. Step 3: Cross multiply
    20,420.82x = 28,159.17 × 16,165.08
  4. Step 4: Simplify right side
    20,420.82x = 455,195,235.78
  5. Step 5: Solve for x
    x = 455,195,235.78/20,420.82
  6. Step 6: Final answer
    x = 22,290.74

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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.