Home / 8,139.42-11,222.55-6,878.25

Finding the Fourth Proportional to 8,139.42, 11,222.55 and 6,878.25

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Solution

The fourth proportional to 8,139.42, 11,222.55 and 6,878.25 is: 9,483.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.42 : 11,222.55 = 6,878.25 : x
  2. Step 2: Convert to fraction form
    8,139.42/11,222.55 = 6,878.25/x
  3. Step 3: Cross multiply
    8,139.42x = 11,222.55 × 6,878.25
  4. Step 4: Simplify right side
    8,139.42x = 77,191,504.54
  5. Step 5: Solve for x
    x = 77,191,504.54/8,139.42
  6. Step 6: Final answer
    x = 9,483.66

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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.