Home / 20,559.90-28,391.67-16,398.30

Finding the Fourth Proportional to 20,559.90, 28,391.67 and 16,398.30

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Solution

The fourth proportional to 20,559.90, 28,391.67 and 16,398.30 is: 22,644.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.90 : 28,391.67 = 16,398.30 : x
  2. Step 2: Convert to fraction form
    20,559.90/28,391.67 = 16,398.30/x
  3. Step 3: Cross multiply
    20,559.90x = 28,391.67 × 16,398.30
  4. Step 4: Simplify right side
    20,559.90x = 465,575,122.16
  5. Step 5: Solve for x
    x = 465,575,122.16/20,559.90
  6. Step 6: Final answer
    x = 22,644.81

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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.