Home / 20,860.70-31,291.18-5,278.32

Finding the Fourth Proportional to 20,860.70, 31,291.18 and 5,278.32

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Solution

The fourth proportional to 20,860.70, 31,291.18 and 5,278.32 is: 7,917.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.70 : 31,291.18 = 5,278.32 : x
  2. Step 2: Convert to fraction form
    20,860.70/31,291.18 = 5,278.32/x
  3. Step 3: Cross multiply
    20,860.70x = 31,291.18 × 5,278.32
  4. Step 4: Simplify right side
    20,860.70x = 165,164,861.22
  5. Step 5: Solve for x
    x = 165,164,861.22/20,860.70
  6. Step 6: Final answer
    x = 7,917.51

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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.