Home / 21,175.20-31,775.40-8,028.90

Finding the Fourth Proportional to 21,175.20, 31,775.40 and 8,028.90

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Solution

The fourth proportional to 21,175.20, 31,775.40 and 8,028.90 is: 12,048.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.20 : 31,775.40 = 8,028.90 : x
  2. Step 2: Convert to fraction form
    21,175.20/31,775.40 = 8,028.90/x
  3. Step 3: Cross multiply
    21,175.20x = 31,775.40 × 8,028.90
  4. Step 4: Simplify right side
    21,175.20x = 255,121,509.06
  5. Step 5: Solve for x
    x = 255,121,509.06/21,175.20
  6. Step 6: Final answer
    x = 12,048.13

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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.