Home / 20,215.89-30,329.29-11,456.95

Finding the Fourth Proportional to 20,215.89, 30,329.29 and 11,456.95

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Solution

The fourth proportional to 20,215.89, 30,329.29 and 11,456.95 is: 17,188.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.89 : 30,329.29 = 11,456.95 : x
  2. Step 2: Convert to fraction form
    20,215.89/30,329.29 = 11,456.95/x
  3. Step 3: Cross multiply
    20,215.89x = 30,329.29 × 11,456.95
  4. Step 4: Simplify right side
    20,215.89x = 347,481,159.07
  5. Step 5: Solve for x
    x = 347,481,159.07/20,215.89
  6. Step 6: Final answer
    x = 17,188.52

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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.