Home / 20,705.70-31,062.60-8,859.45

Finding the Fourth Proportional to 20,705.70, 31,062.60 and 8,859.45

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Solution

The fourth proportional to 20,705.70, 31,062.60 and 8,859.45 is: 13,290.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.70 : 31,062.60 = 8,859.45 : x
  2. Step 2: Convert to fraction form
    20,705.70/31,062.60 = 8,859.45/x
  3. Step 3: Cross multiply
    20,705.70x = 31,062.60 × 8,859.45
  4. Step 4: Simplify right side
    20,705.70x = 275,197,551.57
  5. Step 5: Solve for x
    x = 275,197,551.57/20,705.70
  6. Step 6: Final answer
    x = 13,290.91

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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.