Home / 28,021.85-38,669.62-15,275.15

Finding the Fourth Proportional to 28,021.85, 38,669.62 and 15,275.15

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Solution

The fourth proportional to 28,021.85, 38,669.62 and 15,275.15 is: 21,079.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.85 : 38,669.62 = 15,275.15 : x
  2. Step 2: Convert to fraction form
    28,021.85/38,669.62 = 15,275.15/x
  3. Step 3: Cross multiply
    28,021.85x = 38,669.62 × 15,275.15
  4. Step 4: Simplify right side
    28,021.85x = 590,684,245.94
  5. Step 5: Solve for x
    x = 590,684,245.94/28,021.85
  6. Step 6: Final answer
    x = 21,079.42

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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.