Home / 20,243.40-30,371.05-10,389.56

Finding the Fourth Proportional to 20,243.40, 30,371.05 and 10,389.56

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Solution

The fourth proportional to 20,243.40, 30,371.05 and 10,389.56 is: 15,587.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,243.40 : 30,371.05 = 10,389.56 : x
  2. Step 2: Convert to fraction form
    20,243.40/30,371.05 = 10,389.56/x
  3. Step 3: Cross multiply
    20,243.40x = 30,371.05 × 10,389.56
  4. Step 4: Simplify right side
    20,243.40x = 315,541,846.24
  5. Step 5: Solve for x
    x = 315,541,846.24/20,243.40
  6. Step 6: Final answer
    x = 15,587.39

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1.5x scale

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.