Home / 20,787.93-28,687.43-11,356.70

Finding the Fourth Proportional to 20,787.93, 28,687.43 and 11,356.70

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Solution

The fourth proportional to 20,787.93, 28,687.43 and 11,356.70 is: 15,672.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.93 : 28,687.43 = 11,356.70 : x
  2. Step 2: Convert to fraction form
    20,787.93/28,687.43 = 11,356.70/x
  3. Step 3: Cross multiply
    20,787.93x = 28,687.43 × 11,356.70
  4. Step 4: Simplify right side
    20,787.93x = 325,794,421.24
  5. Step 5: Solve for x
    x = 325,794,421.24/20,787.93
  6. Step 6: Final answer
    x = 15,672.29

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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.