Home / 20,787.13-28,689.74-11,833.39

Finding the Fourth Proportional to 20,787.13, 28,689.74 and 11,833.39

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Solution

The fourth proportional to 20,787.13, 28,689.74 and 11,833.39 is: 16,332.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.13 : 28,689.74 = 11,833.39 : x
  2. Step 2: Convert to fraction form
    20,787.13/28,689.74 = 11,833.39/x
  3. Step 3: Cross multiply
    20,787.13x = 28,689.74 × 11,833.39
  4. Step 4: Simplify right side
    20,787.13x = 339,496,970.05
  5. Step 5: Solve for x
    x = 339,496,970.05/20,787.13
  6. Step 6: Final answer
    x = 16,332.07

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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.