Home / 28,319-39,080.27-15,743.75

Finding the Fourth Proportional to 28,319, 39,080.27 and 15,743.75

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Solution

The fourth proportional to 28,319, 39,080.27 and 15,743.75 is: 21,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319 : 39,080.27 = 15,743.75 : x
  2. Step 2: Convert to fraction form
    28,319/39,080.27 = 15,743.75/x
  3. Step 3: Cross multiply
    28,319x = 39,080.27 × 15,743.75
  4. Step 4: Simplify right side
    28,319x = 615,270,000.81
  5. Step 5: Solve for x
    x = 615,270,000.81/28,319
  6. Step 6: Final answer
    x = 21,726.40

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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.