Home / 28,164.24-38,825.25-21,438.15

Finding the Fourth Proportional to 28,164.24, 38,825.25 and 21,438.15

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Solution

The fourth proportional to 28,164.24, 38,825.25 and 21,438.15 is: 29,553.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,164.24 : 38,825.25 = 21,438.15 : x
  2. Step 2: Convert to fraction form
    28,164.24/38,825.25 = 21,438.15/x
  3. Step 3: Cross multiply
    28,164.24x = 38,825.25 × 21,438.15
  4. Step 4: Simplify right side
    28,164.24x = 832,341,533.29
  5. Step 5: Solve for x
    x = 832,341,533.29/28,164.24
  6. Step 6: Final answer
    x = 29,553.13

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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.