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Finding the Fourth Proportional to 6,878.46, 9,488.31 and 4,187.58

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Solution

The fourth proportional to 6,878.46, 9,488.31 and 4,187.58 is: 5,776.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,878.46 : 9,488.31 = 4,187.58 : x
  2. Step 2: Convert to fraction form
    6,878.46/9,488.31 = 4,187.58/x
  3. Step 3: Cross multiply
    6,878.46x = 9,488.31 × 4,187.58
  4. Step 4: Simplify right side
    6,878.46x = 39,733,057.19
  5. Step 5: Solve for x
    x = 39,733,057.19/6,878.46
  6. Step 6: Final answer
    x = 5,776.45

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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.