Home / 27,143.82-40,655.57-20,857.56

Finding the Fourth Proportional to 27,143.82, 40,655.57 and 20,857.56

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Solution

The fourth proportional to 27,143.82, 40,655.57 and 20,857.56 is: 31,240.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,143.82 : 40,655.57 = 20,857.56 : x
  2. Step 2: Convert to fraction form
    27,143.82/40,655.57 = 20,857.56/x
  3. Step 3: Cross multiply
    27,143.82x = 40,655.57 × 20,857.56
  4. Step 4: Simplify right side
    27,143.82x = 847,975,990.61
  5. Step 5: Solve for x
    x = 847,975,990.61/27,143.82
  6. Step 6: Final answer
    x = 31,240.11

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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.