Home / 21,043.80-29,165.85-20,650.14

Finding the Fourth Proportional to 21,043.80, 29,165.85 and 20,650.14

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Solution

The fourth proportional to 21,043.80, 29,165.85 and 20,650.14 is: 28,620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.80 : 29,165.85 = 20,650.14 : x
  2. Step 2: Convert to fraction form
    21,043.80/29,165.85 = 20,650.14/x
  3. Step 3: Cross multiply
    21,043.80x = 29,165.85 × 20,650.14
  4. Step 4: Simplify right side
    21,043.80x = 602,278,885.72
  5. Step 5: Solve for x
    x = 602,278,885.72/21,043.80
  6. Step 6: Final answer
    x = 28,620.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.