Home / 20,386.94-28,144.52-15,839.46

Finding the Fourth Proportional to 20,386.94, 28,144.52 and 15,839.46

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Solution

The fourth proportional to 20,386.94, 28,144.52 and 15,839.46 is: 21,866.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.94 : 28,144.52 = 15,839.46 : x
  2. Step 2: Convert to fraction form
    20,386.94/28,144.52 = 15,839.46/x
  3. Step 3: Cross multiply
    20,386.94x = 28,144.52 × 15,839.46
  4. Step 4: Simplify right side
    20,386.94x = 445,793,998.76
  5. Step 5: Solve for x
    x = 445,793,998.76/20,386.94
  6. Step 6: Final answer
    x = 21,866.65

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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.