Home / 28,719.18-39,626.61-16,780.21

Finding the Fourth Proportional to 28,719.18, 39,626.61 and 16,780.21

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Solution

The fourth proportional to 28,719.18, 39,626.61 and 16,780.21 is: 23,153.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.18 : 39,626.61 = 16,780.21 : x
  2. Step 2: Convert to fraction form
    28,719.18/39,626.61 = 16,780.21/x
  3. Step 3: Cross multiply
    28,719.18x = 39,626.61 × 16,780.21
  4. Step 4: Simplify right side
    28,719.18x = 664,942,753.49
  5. Step 5: Solve for x
    x = 664,942,753.49/28,719.18
  6. Step 6: Final answer
    x = 23,153.26

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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.