Home / 20,787.09-28,685.10-11,834.56

Finding the Fourth Proportional to 20,787.09, 28,685.10 and 11,834.56

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Solution

The fourth proportional to 20,787.09, 28,685.10 and 11,834.56 is: 16,331.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.09 : 28,685.10 = 11,834.56 : x
  2. Step 2: Convert to fraction form
    20,787.09/28,685.10 = 11,834.56/x
  3. Step 3: Cross multiply
    20,787.09x = 28,685.10 × 11,834.56
  4. Step 4: Simplify right side
    20,787.09x = 339,475,537.06
  5. Step 5: Solve for x
    x = 339,475,537.06/20,787.09
  6. Step 6: Final answer
    x = 16,331.08

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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.