Home / 21,228.38-31,657.25-18,608.02

Finding the Fourth Proportional to 21,228.38, 31,657.25 and 18,608.02

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Solution

The fourth proportional to 21,228.38, 31,657.25 and 18,608.02 is: 27,749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.38 : 31,657.25 = 18,608.02 : x
  2. Step 2: Convert to fraction form
    21,228.38/31,657.25 = 18,608.02/x
  3. Step 3: Cross multiply
    21,228.38x = 31,657.25 × 18,608.02
  4. Step 4: Simplify right side
    21,228.38x = 589,078,741.15
  5. Step 5: Solve for x
    x = 589,078,741.15/21,228.38
  6. Step 6: Final answer
    x = 27,749.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.