Home / 20,715.90-31,077.90-8,233.80

Finding the Fourth Proportional to 20,715.90, 31,077.90 and 8,233.80

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Solution

The fourth proportional to 20,715.90, 31,077.90 and 8,233.80 is: 12,352.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.90 : 31,077.90 = 8,233.80 : x
  2. Step 2: Convert to fraction form
    20,715.90/31,077.90 = 8,233.80/x
  3. Step 3: Cross multiply
    20,715.90x = 31,077.90 × 8,233.80
  4. Step 4: Simplify right side
    20,715.90x = 255,889,213.02
  5. Step 5: Solve for x
    x = 255,889,213.02/20,715.90
  6. Step 6: Final answer
    x = 12,352.31

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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.