Home / 21,177.60-31,766.40-16,771.20

Finding the Fourth Proportional to 21,177.60, 31,766.40 and 16,771.20

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Solution

The fourth proportional to 21,177.60, 31,766.40 and 16,771.20 is: 25,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.60 : 31,766.40 = 16,771.20 : x
  2. Step 2: Convert to fraction form
    21,177.60/31,766.40 = 16,771.20/x
  3. Step 3: Cross multiply
    21,177.60x = 31,766.40 × 16,771.20
  4. Step 4: Simplify right side
    21,177.60x = 532,760,647.68
  5. Step 5: Solve for x
    x = 532,760,647.68/21,177.60
  6. Step 6: Final answer
    x = 25,156.80

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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.