Home / 20,766.70-31,150.05-18,520.30

Finding the Fourth Proportional to 20,766.70, 31,150.05 and 18,520.30

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Solution

The fourth proportional to 20,766.70, 31,150.05 and 18,520.30 is: 27,780.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.70 : 31,150.05 = 18,520.30 : x
  2. Step 2: Convert to fraction form
    20,766.70/31,150.05 = 18,520.30/x
  3. Step 3: Cross multiply
    20,766.70x = 31,150.05 × 18,520.30
  4. Step 4: Simplify right side
    20,766.70x = 576,908,271.02
  5. Step 5: Solve for x
    x = 576,908,271.02/20,766.70
  6. Step 6: Final answer
    x = 27,780.45

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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.