Home / 20,778.57-31,167.65-5,196.20

Finding the Fourth Proportional to 20,778.57, 31,167.65 and 5,196.20

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Solution

The fourth proportional to 20,778.57, 31,167.65 and 5,196.20 is: 7,794.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.57 : 31,167.65 = 5,196.20 : x
  2. Step 2: Convert to fraction form
    20,778.57/31,167.65 = 5,196.20/x
  3. Step 3: Cross multiply
    20,778.57x = 31,167.65 × 5,196.20
  4. Step 4: Simplify right side
    20,778.57x = 161,953,200.08
  5. Step 5: Solve for x
    x = 161,953,200.08/20,778.57
  6. Step 6: Final answer
    x = 7,794.24

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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.