Home / 18,350.10-25,321.41-12,690.90

Finding the Fourth Proportional to 18,350.10, 25,321.41 and 12,690.90

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Solution

The fourth proportional to 18,350.10, 25,321.41 and 12,690.90 is: 17,512.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,350.10 : 25,321.41 = 12,690.90 : x
  2. Step 2: Convert to fraction form
    18,350.10/25,321.41 = 12,690.90/x
  3. Step 3: Cross multiply
    18,350.10x = 25,321.41 × 12,690.90
  4. Step 4: Simplify right side
    18,350.10x = 321,351,482.17
  5. Step 5: Solve for x
    x = 321,351,482.17/18,350.10
  6. Step 6: Final answer
    x = 17,512.25

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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.