Home / 28,187.28-38,835.80-18,610.10

Finding the Fourth Proportional to 28,187.28, 38,835.80 and 18,610.10

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Solution

The fourth proportional to 28,187.28, 38,835.80 and 18,610.10 is: 25,640.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.28 : 38,835.80 = 18,610.10 : x
  2. Step 2: Convert to fraction form
    28,187.28/38,835.80 = 18,610.10/x
  3. Step 3: Cross multiply
    28,187.28x = 38,835.80 × 18,610.10
  4. Step 4: Simplify right side
    28,187.28x = 722,738,121.58
  5. Step 5: Solve for x
    x = 722,738,121.58/28,187.28
  6. Step 6: Final answer
    x = 25,640.58

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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.