Home / 20,740.20-31,110.30-18,493.80

Finding the Fourth Proportional to 20,740.20, 31,110.30 and 18,493.80

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Solution

The fourth proportional to 20,740.20, 31,110.30 and 18,493.80 is: 27,740.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.20 : 31,110.30 = 18,493.80 : x
  2. Step 2: Convert to fraction form
    20,740.20/31,110.30 = 18,493.80/x
  3. Step 3: Cross multiply
    20,740.20x = 31,110.30 × 18,493.80
  4. Step 4: Simplify right side
    20,740.20x = 575,347,666.14
  5. Step 5: Solve for x
    x = 575,347,666.14/20,740.20
  6. Step 6: Final answer
    x = 27,740.70

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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.