Home / 20,705.25-31,058.55-5,122.89

Finding the Fourth Proportional to 20,705.25, 31,058.55 and 5,122.89

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Solution

The fourth proportional to 20,705.25, 31,058.55 and 5,122.89 is: 7,684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.25 : 31,058.55 = 5,122.89 : x
  2. Step 2: Convert to fraction form
    20,705.25/31,058.55 = 5,122.89/x
  3. Step 3: Cross multiply
    20,705.25x = 31,058.55 × 5,122.89
  4. Step 4: Simplify right side
    20,705.25x = 159,109,535.21
  5. Step 5: Solve for x
    x = 159,109,535.21/20,705.25
  6. Step 6: Final answer
    x = 7,684.50

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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.