Home / 28,719.12-39,626.56-16,780.15

Finding the Fourth Proportional to 28,719.12, 39,626.56 and 16,780.15

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Solution

The fourth proportional to 28,719.12, 39,626.56 and 16,780.15 is: 23,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.12 : 39,626.56 = 16,780.15 : x
  2. Step 2: Convert to fraction form
    28,719.12/39,626.56 = 16,780.15/x
  3. Step 3: Cross multiply
    28,719.12x = 39,626.56 × 16,780.15
  4. Step 4: Simplify right side
    28,719.12x = 664,939,620.78
  5. Step 5: Solve for x
    x = 664,939,620.78/28,719.12
  6. Step 6: Final answer
    x = 23,153.20

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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.