Home / 20,787.48-28,687.50-11,356.11

Finding the Fourth Proportional to 20,787.48, 28,687.50 and 11,356.11

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Solution

The fourth proportional to 20,787.48, 28,687.50 and 11,356.11 is: 15,671.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.48 : 28,687.50 = 11,356.11 : x
  2. Step 2: Convert to fraction form
    20,787.48/28,687.50 = 11,356.11/x
  3. Step 3: Cross multiply
    20,787.48x = 28,687.50 × 11,356.11
  4. Step 4: Simplify right side
    20,787.48x = 325,778,405.63
  5. Step 5: Solve for x
    x = 325,778,405.63/20,787.48
  6. Step 6: Final answer
    x = 15,671.86

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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.