Home / 20,770.26-28,666.25-13,208.71

Finding the Fourth Proportional to 20,770.26, 28,666.25 and 13,208.71

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Solution

The fourth proportional to 20,770.26, 28,666.25 and 13,208.71 is: 18,230.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.26 : 28,666.25 = 13,208.71 : x
  2. Step 2: Convert to fraction form
    20,770.26/28,666.25 = 13,208.71/x
  3. Step 3: Cross multiply
    20,770.26x = 28,666.25 × 13,208.71
  4. Step 4: Simplify right side
    20,770.26x = 378,644,094.86
  5. Step 5: Solve for x
    x = 378,644,094.86/20,770.26
  6. Step 6: Final answer
    x = 18,230.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.