Home / 8,278.88-11,429.08-6,386.21

Finding the Fourth Proportional to 8,278.88, 11,429.08 and 6,386.21

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Solution

The fourth proportional to 8,278.88, 11,429.08 and 6,386.21 is: 8,816.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.88 : 11,429.08 = 6,386.21 : x
  2. Step 2: Convert to fraction form
    8,278.88/11,429.08 = 6,386.21/x
  3. Step 3: Cross multiply
    8,278.88x = 11,429.08 × 6,386.21
  4. Step 4: Simplify right side
    8,278.88x = 72,988,520.11
  5. Step 5: Solve for x
    x = 72,988,520.11/8,278.88
  6. Step 6: Final answer
    x = 8,816.23

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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.