Home / 20,275.50-30,431.93-10,287.27

Finding the Fourth Proportional to 20,275.50, 30,431.93 and 10,287.27

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Solution

The fourth proportional to 20,275.50, 30,431.93 and 10,287.27 is: 15,440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.50 : 30,431.93 = 10,287.27 : x
  2. Step 2: Convert to fraction form
    20,275.50/30,431.93 = 10,287.27/x
  3. Step 3: Cross multiply
    20,275.50x = 30,431.93 × 10,287.27
  4. Step 4: Simplify right side
    20,275.50x = 313,061,587.32
  5. Step 5: Solve for x
    x = 313,061,587.32/20,275.50
  6. Step 6: Final answer
    x = 15,440.39

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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.