Home / 20,243.90-30,371.80-10,390.06

Finding the Fourth Proportional to 20,243.90, 30,371.80 and 10,390.06

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Solution

The fourth proportional to 20,243.90, 30,371.80 and 10,390.06 is: 15,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,243.90 : 30,371.80 = 10,390.06 : x
  2. Step 2: Convert to fraction form
    20,243.90/30,371.80 = 10,390.06/x
  3. Step 3: Cross multiply
    20,243.90x = 30,371.80 × 10,390.06
  4. Step 4: Simplify right side
    20,243.90x = 315,564,824.31
  5. Step 5: Solve for x
    x = 315,564,824.31/20,243.90
  6. Step 6: Final answer
    x = 15,588.14

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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.