Home / 20,280.95-27,986.31-11,205.92

Finding the Fourth Proportional to 20,280.95, 27,986.31 and 11,205.92

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Solution

The fourth proportional to 20,280.95, 27,986.31 and 11,205.92 is: 15,463.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.95 : 27,986.31 = 11,205.92 : x
  2. Step 2: Convert to fraction form
    20,280.95/27,986.31 = 11,205.92/x
  3. Step 3: Cross multiply
    20,280.95x = 27,986.31 × 11,205.92
  4. Step 4: Simplify right side
    20,280.95x = 313,612,350.96
  5. Step 5: Solve for x
    x = 313,612,350.96/20,280.95
  6. Step 6: Final answer
    x = 15,463.40

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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.