Home / 8,419.28-11,618.69-4,642.58

Finding the Fourth Proportional to 8,419.28, 11,618.69 and 4,642.58

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Solution

The fourth proportional to 8,419.28, 11,618.69 and 4,642.58 is: 6,406.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.28 : 11,618.69 = 4,642.58 : x
  2. Step 2: Convert to fraction form
    8,419.28/11,618.69 = 4,642.58/x
  3. Step 3: Cross multiply
    8,419.28x = 11,618.69 × 4,642.58
  4. Step 4: Simplify right side
    8,419.28x = 53,940,697.82
  5. Step 5: Solve for x
    x = 53,940,697.82/8,419.28
  6. Step 6: Final answer
    x = 6,406.81

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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.