Home / 15,077.90-20,808.78-8,365.70

Finding the Fourth Proportional to 15,077.90, 20,808.78 and 8,365.70

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Solution

The fourth proportional to 15,077.90, 20,808.78 and 8,365.70 is: 11,545.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.90 : 20,808.78 = 8,365.70 : x
  2. Step 2: Convert to fraction form
    15,077.90/20,808.78 = 8,365.70/x
  3. Step 3: Cross multiply
    15,077.90x = 20,808.78 × 8,365.70
  4. Step 4: Simplify right side
    15,077.90x = 174,079,906.80
  5. Step 5: Solve for x
    x = 174,079,906.80/15,077.90
  6. Step 6: Final answer
    x = 11,545.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.