Home / 28,398-39,189.36-15,823.68

Finding the Fourth Proportional to 28,398, 39,189.36 and 15,823.68

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Solution

The fourth proportional to 28,398, 39,189.36 and 15,823.68 is: 21,836.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398 : 39,189.36 = 15,823.68 : x
  2. Step 2: Convert to fraction form
    28,398/39,189.36 = 15,823.68/x
  3. Step 3: Cross multiply
    28,398x = 39,189.36 × 15,823.68
  4. Step 4: Simplify right side
    28,398x = 620,119,892.04
  5. Step 5: Solve for x
    x = 620,119,892.04/28,398
  6. Step 6: Final answer
    x = 21,836.75

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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.