Home / 21,085.20-31,629.60-7,234.20

Finding the Fourth Proportional to 21,085.20, 31,629.60 and 7,234.20

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Solution

The fourth proportional to 21,085.20, 31,629.60 and 7,234.20 is: 10,851.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.20 : 31,629.60 = 7,234.20 : x
  2. Step 2: Convert to fraction form
    21,085.20/31,629.60 = 7,234.20/x
  3. Step 3: Cross multiply
    21,085.20x = 31,629.60 × 7,234.20
  4. Step 4: Simplify right side
    21,085.20x = 228,814,852.32
  5. Step 5: Solve for x
    x = 228,814,852.32/21,085.20
  6. Step 6: Final answer
    x = 10,851.92

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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.