Home / 20,770.70-28,663.41-11,339.25

Finding the Fourth Proportional to 20,770.70, 28,663.41 and 11,339.25

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Solution

The fourth proportional to 20,770.70, 28,663.41 and 11,339.25 is: 15,648.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.70 : 28,663.41 = 11,339.25 : x
  2. Step 2: Convert to fraction form
    20,770.70/28,663.41 = 11,339.25/x
  3. Step 3: Cross multiply
    20,770.70x = 28,663.41 × 11,339.25
  4. Step 4: Simplify right side
    20,770.70x = 325,021,571.84
  5. Step 5: Solve for x
    x = 325,021,571.84/20,770.70
  6. Step 6: Final answer
    x = 15,648.08

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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.