Home / 28,189.71-38,848.23-20,218.14

Finding the Fourth Proportional to 28,189.71, 38,848.23 and 20,218.14

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Solution

The fourth proportional to 28,189.71, 38,848.23 and 20,218.14 is: 27,862.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.71 : 38,848.23 = 20,218.14 : x
  2. Step 2: Convert to fraction form
    28,189.71/38,848.23 = 20,218.14/x
  3. Step 3: Cross multiply
    28,189.71x = 38,848.23 × 20,218.14
  4. Step 4: Simplify right side
    28,189.71x = 785,438,952.89
  5. Step 5: Solve for x
    x = 785,438,952.89/28,189.71
  6. Step 6: Final answer
    x = 27,862.61

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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.