Home / 13,820.34-20,716.22-6,418.76

Finding the Fourth Proportional to 13,820.34, 20,716.22 and 6,418.76

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Solution

The fourth proportional to 13,820.34, 20,716.22 and 6,418.76 is: 9,621.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.34 : 20,716.22 = 6,418.76 : x
  2. Step 2: Convert to fraction form
    13,820.34/20,716.22 = 6,418.76/x
  3. Step 3: Cross multiply
    13,820.34x = 20,716.22 × 6,418.76
  4. Step 4: Simplify right side
    13,820.34x = 132,972,308.61
  5. Step 5: Solve for x
    x = 132,972,308.61/13,820.34
  6. Step 6: Final answer
    x = 9,621.49

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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.