Home / 20,009.78-30,033.49-10,156.13

Finding the Fourth Proportional to 20,009.78, 30,033.49 and 10,156.13

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Solution

The fourth proportional to 20,009.78, 30,033.49 and 10,156.13 is: 15,243.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.78 : 30,033.49 = 10,156.13 : x
  2. Step 2: Convert to fraction form
    20,009.78/30,033.49 = 10,156.13/x
  3. Step 3: Cross multiply
    20,009.78x = 30,033.49 × 10,156.13
  4. Step 4: Simplify right side
    20,009.78x = 305,024,028.79
  5. Step 5: Solve for x
    x = 305,024,028.79/20,009.78
  6. Step 6: Final answer
    x = 15,243.75

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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.