Home / 20,766.40-31,131.06-7,615.70

Finding the Fourth Proportional to 20,766.40, 31,131.06 and 7,615.70

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Solution

The fourth proportional to 20,766.40, 31,131.06 and 7,615.70 is: 11,416.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.40 : 31,131.06 = 7,615.70 : x
  2. Step 2: Convert to fraction form
    20,766.40/31,131.06 = 7,615.70/x
  3. Step 3: Cross multiply
    20,766.40x = 31,131.06 × 7,615.70
  4. Step 4: Simplify right side
    20,766.40x = 237,084,813.64
  5. Step 5: Solve for x
    x = 237,084,813.64/20,766.40
  6. Step 6: Final answer
    x = 11,416.75

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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.