Home / 28,343.94-39,127.26-20,790.18

Finding the Fourth Proportional to 28,343.94, 39,127.26 and 20,790.18

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Solution

The fourth proportional to 28,343.94, 39,127.26 and 20,790.18 is: 28,699.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.94 : 39,127.26 = 20,790.18 : x
  2. Step 2: Convert to fraction form
    28,343.94/39,127.26 = 20,790.18/x
  3. Step 3: Cross multiply
    28,343.94x = 39,127.26 × 20,790.18
  4. Step 4: Simplify right side
    28,343.94x = 813,462,778.31
  5. Step 5: Solve for x
    x = 813,462,778.31/28,343.94
  6. Step 6: Final answer
    x = 28,699.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.