Home / 28,146.72-38,843.04-15,571.68

Finding the Fourth Proportional to 28,146.72, 38,843.04 and 15,571.68

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Solution

The fourth proportional to 28,146.72, 38,843.04 and 15,571.68 is: 21,489.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,146.72 : 38,843.04 = 15,571.68 : x
  2. Step 2: Convert to fraction form
    28,146.72/38,843.04 = 15,571.68/x
  3. Step 3: Cross multiply
    28,146.72x = 38,843.04 × 15,571.68
  4. Step 4: Simplify right side
    28,146.72x = 604,851,389.11
  5. Step 5: Solve for x
    x = 604,851,389.11/28,146.72
  6. Step 6: Final answer
    x = 21,489.23

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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.