Home / 16,720.40-25,129.20-16,428.80

Finding the Fourth Proportional to 16,720.40, 25,129.20 and 16,428.80

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Solution

The fourth proportional to 16,720.40, 25,129.20 and 16,428.80 is: 24,690.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,720.40 : 25,129.20 = 16,428.80 : x
  2. Step 2: Convert to fraction form
    16,720.40/25,129.20 = 16,428.80/x
  3. Step 3: Cross multiply
    16,720.40x = 25,129.20 × 16,428.80
  4. Step 4: Simplify right side
    16,720.40x = 412,842,600.96
  5. Step 5: Solve for x
    x = 412,842,600.96/16,720.40
  6. Step 6: Final answer
    x = 24,690.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.