Home / 6,878.80-9,475.20-5,815.36

Finding the Fourth Proportional to 6,878.80, 9,475.20 and 5,815.36

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Solution

The fourth proportional to 6,878.80, 9,475.20 and 5,815.36 is: 8,010.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,878.80 : 9,475.20 = 5,815.36 : x
  2. Step 2: Convert to fraction form
    6,878.80/9,475.20 = 5,815.36/x
  3. Step 3: Cross multiply
    6,878.80x = 9,475.20 × 5,815.36
  4. Step 4: Simplify right side
    6,878.80x = 55,101,699.07
  5. Step 5: Solve for x
    x = 55,101,699.07/6,878.80
  6. Step 6: Final answer
    x = 8,010.37

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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.