Home / 21,321.15-31,981.85-5,525.10

Finding the Fourth Proportional to 21,321.15, 31,981.85 and 5,525.10

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Solution

The fourth proportional to 21,321.15, 31,981.85 and 5,525.10 is: 8,287.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.15 : 31,981.85 = 5,525.10 : x
  2. Step 2: Convert to fraction form
    21,321.15/31,981.85 = 5,525.10/x
  3. Step 3: Cross multiply
    21,321.15x = 31,981.85 × 5,525.10
  4. Step 4: Simplify right side
    21,321.15x = 176,702,891.81
  5. Step 5: Solve for x
    x = 176,702,891.81/21,321.15
  6. Step 6: Final answer
    x = 8,287.68

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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.