Home / 20,489.94-28,277.46-15,445.26

Finding the Fourth Proportional to 20,489.94, 28,277.46 and 15,445.26

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Solution

The fourth proportional to 20,489.94, 28,277.46 and 15,445.26 is: 21,315.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.94 : 28,277.46 = 15,445.26 : x
  2. Step 2: Convert to fraction form
    20,489.94/28,277.46 = 15,445.26/x
  3. Step 3: Cross multiply
    20,489.94x = 28,277.46 × 15,445.26
  4. Step 4: Simplify right side
    20,489.94x = 436,752,721.84
  5. Step 5: Solve for x
    x = 436,752,721.84/20,489.94
  6. Step 6: Final answer
    x = 21,315.47

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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.