Home / 21,025.68-31,536.60-12,255.12

Finding the Fourth Proportional to 21,025.68, 31,536.60 and 12,255.12

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Solution

The fourth proportional to 21,025.68, 31,536.60 and 12,255.12 is: 18,381.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.68 : 31,536.60 = 12,255.12 : x
  2. Step 2: Convert to fraction form
    21,025.68/31,536.60 = 12,255.12/x
  3. Step 3: Cross multiply
    21,025.68x = 31,536.60 × 12,255.12
  4. Step 4: Simplify right side
    21,025.68x = 386,484,817.39
  5. Step 5: Solve for x
    x = 386,484,817.39/21,025.68
  6. Step 6: Final answer
    x = 18,381.56

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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.