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Finding the Fourth Proportional to 16,983.40, 25,499.40 and 12,074.80

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Solution

The fourth proportional to 16,983.40, 25,499.40 and 12,074.80 is: 18,129.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,983.40 : 25,499.40 = 12,074.80 : x
  2. Step 2: Convert to fraction form
    16,983.40/25,499.40 = 12,074.80/x
  3. Step 3: Cross multiply
    16,983.40x = 25,499.40 × 12,074.80
  4. Step 4: Simplify right side
    16,983.40x = 307,900,155.12
  5. Step 5: Solve for x
    x = 307,900,155.12/16,983.40
  6. Step 6: Final answer
    x = 18,129.48

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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.