Home / 20,283.59-30,408.98-7,145.21

Finding the Fourth Proportional to 20,283.59, 30,408.98 and 7,145.21

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Solution

The fourth proportional to 20,283.59, 30,408.98 and 7,145.21 is: 10,712.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,283.59 : 30,408.98 = 7,145.21 : x
  2. Step 2: Convert to fraction form
    20,283.59/30,408.98 = 7,145.21/x
  3. Step 3: Cross multiply
    20,283.59x = 30,408.98 × 7,145.21
  4. Step 4: Simplify right side
    20,283.59x = 217,278,360.21
  5. Step 5: Solve for x
    x = 217,278,360.21/20,283.59
  6. Step 6: Final answer
    x = 10,712.03

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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.