Home / 20,435.74-30,652.75-7,111.78

Finding the Fourth Proportional to 20,435.74, 30,652.75 and 7,111.78

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Solution

The fourth proportional to 20,435.74, 30,652.75 and 7,111.78 is: 10,667.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.74 : 30,652.75 = 7,111.78 : x
  2. Step 2: Convert to fraction form
    20,435.74/30,652.75 = 7,111.78/x
  3. Step 3: Cross multiply
    20,435.74x = 30,652.75 × 7,111.78
  4. Step 4: Simplify right side
    20,435.74x = 217,995,614.40
  5. Step 5: Solve for x
    x = 217,995,614.40/20,435.74
  6. Step 6: Final answer
    x = 10,667.37

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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.