Home / 8,218.32-11,345.88-5,428.68

Finding the Fourth Proportional to 8,218.32, 11,345.88 and 5,428.68

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Solution

The fourth proportional to 8,218.32, 11,345.88 and 5,428.68 is: 7,494.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,218.32 : 11,345.88 = 5,428.68 : x
  2. Step 2: Convert to fraction form
    8,218.32/11,345.88 = 5,428.68/x
  3. Step 3: Cross multiply
    8,218.32x = 11,345.88 × 5,428.68
  4. Step 4: Simplify right side
    8,218.32x = 61,593,151.84
  5. Step 5: Solve for x
    x = 61,593,151.84/8,218.32
  6. Step 6: Final answer
    x = 7,494.62

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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.