Home / 20,787.25-31,160.12-7,456.63

Finding the Fourth Proportional to 20,787.25, 31,160.12 and 7,456.63

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Solution

The fourth proportional to 20,787.25, 31,160.12 and 7,456.63 is: 11,177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.25 : 31,160.12 = 7,456.63 : x
  2. Step 2: Convert to fraction form
    20,787.25/31,160.12 = 7,456.63/x
  3. Step 3: Cross multiply
    20,787.25x = 31,160.12 × 7,456.63
  4. Step 4: Simplify right side
    20,787.25x = 232,349,448.31
  5. Step 5: Solve for x
    x = 232,349,448.31/20,787.25
  6. Step 6: Final answer
    x = 11,177.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.