Home / 20,106.16-30,170.40-10,247.20

Finding the Fourth Proportional to 20,106.16, 30,170.40 and 10,247.20

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Solution

The fourth proportional to 20,106.16, 30,170.40 and 10,247.20 is: 15,376.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.16 : 30,170.40 = 10,247.20 : x
  2. Step 2: Convert to fraction form
    20,106.16/30,170.40 = 10,247.20/x
  3. Step 3: Cross multiply
    20,106.16x = 30,170.40 × 10,247.20
  4. Step 4: Simplify right side
    20,106.16x = 309,162,122.88
  5. Step 5: Solve for x
    x = 309,162,122.88/20,106.16
  6. Step 6: Final answer
    x = 15,376.49

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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.