Home / 20,820.38-31,230.59-5,238

Finding the Fourth Proportional to 20,820.38, 31,230.59 and 5,238

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Solution

The fourth proportional to 20,820.38, 31,230.59 and 5,238 is: 7,857.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.38 : 31,230.59 = 5,238 : x
  2. Step 2: Convert to fraction form
    20,820.38/31,230.59 = 5,238/x
  3. Step 3: Cross multiply
    20,820.38x = 31,230.59 × 5,238
  4. Step 4: Simplify right side
    20,820.38x = 163,585,804.23
  5. Step 5: Solve for x
    x = 163,585,804.23/20,820.38
  6. Step 6: Final answer
    x = 7,857.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.