Home / 8,419.28-11,618.39-4,642.43

Finding the Fourth Proportional to 8,419.28, 11,618.39 and 4,642.43

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Solution

The fourth proportional to 8,419.28, 11,618.39 and 4,642.43 is: 6,406.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.28 : 11,618.39 = 4,642.43 : x
  2. Step 2: Convert to fraction form
    8,419.28/11,618.39 = 4,642.43/x
  3. Step 3: Cross multiply
    8,419.28x = 11,618.39 × 4,642.43
  4. Step 4: Simplify right side
    8,419.28x = 53,937,480.98
  5. Step 5: Solve for x
    x = 53,937,480.98/8,419.28
  6. Step 6: Final answer
    x = 6,406.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.