Home / 28,105.37-38,785.41-15,530.12

Finding the Fourth Proportional to 28,105.37, 38,785.41 and 15,530.12

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Solution

The fourth proportional to 28,105.37, 38,785.41 and 15,530.12 is: 21,431.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.37 : 38,785.41 = 15,530.12 : x
  2. Step 2: Convert to fraction form
    28,105.37/38,785.41 = 15,530.12/x
  3. Step 3: Cross multiply
    28,105.37x = 38,785.41 × 15,530.12
  4. Step 4: Simplify right side
    28,105.37x = 602,341,877.62
  5. Step 5: Solve for x
    x = 602,341,877.62/28,105.37
  6. Step 6: Final answer
    x = 21,431.56

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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.