Home / 16,811.38-25,220.85-5,125.78

Finding the Fourth Proportional to 16,811.38, 25,220.85 and 5,125.78

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Solution

The fourth proportional to 16,811.38, 25,220.85 and 5,125.78 is: 7,689.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,811.38 : 25,220.85 = 5,125.78 : x
  2. Step 2: Convert to fraction form
    16,811.38/25,220.85 = 5,125.78/x
  3. Step 3: Cross multiply
    16,811.38x = 25,220.85 × 5,125.78
  4. Step 4: Simplify right side
    16,811.38x = 129,276,528.51
  5. Step 5: Solve for x
    x = 129,276,528.51/16,811.38
  6. Step 6: Final answer
    x = 7,689.82

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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.