Home / 20,558.40-28,389.60-16,396.80

Finding the Fourth Proportional to 20,558.40, 28,389.60 and 16,396.80

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Solution

The fourth proportional to 20,558.40, 28,389.60 and 16,396.80 is: 22,642.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.40 : 28,389.60 = 16,396.80 : x
  2. Step 2: Convert to fraction form
    20,558.40/28,389.60 = 16,396.80/x
  3. Step 3: Cross multiply
    20,558.40x = 28,389.60 × 16,396.80
  4. Step 4: Simplify right side
    20,558.40x = 465,498,593.28
  5. Step 5: Solve for x
    x = 465,498,593.28/20,558.40
  6. Step 6: Final answer
    x = 22,642.74

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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.