Home / 28,140.66-38,832.48-15,391.29

Finding the Fourth Proportional to 28,140.66, 38,832.48 and 15,391.29

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Solution

The fourth proportional to 28,140.66, 38,832.48 and 15,391.29 is: 21,239.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.66 : 38,832.48 = 15,391.29 : x
  2. Step 2: Convert to fraction form
    28,140.66/38,832.48 = 15,391.29/x
  3. Step 3: Cross multiply
    28,140.66x = 38,832.48 × 15,391.29
  4. Step 4: Simplify right side
    28,140.66x = 597,682,106.72
  5. Step 5: Solve for x
    x = 597,682,106.72/28,140.66
  6. Step 6: Final answer
    x = 21,239.09

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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.