Home / 21,177.80-31,766.70-8,030.60

Finding the Fourth Proportional to 21,177.80, 31,766.70 and 8,030.60

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Solution

The fourth proportional to 21,177.80, 31,766.70 and 8,030.60 is: 12,045.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.80 : 31,766.70 = 8,030.60 : x
  2. Step 2: Convert to fraction form
    21,177.80/31,766.70 = 8,030.60/x
  3. Step 3: Cross multiply
    21,177.80x = 31,766.70 × 8,030.60
  4. Step 4: Simplify right side
    21,177.80x = 255,105,661.02
  5. Step 5: Solve for x
    x = 255,105,661.02/21,177.80
  6. Step 6: Final answer
    x = 12,045.90

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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.