Home / 6,870.79-9,481.70-3,886.56

Finding the Fourth Proportional to 6,870.79, 9,481.70 and 3,886.56

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Solution

The fourth proportional to 6,870.79, 9,481.70 and 3,886.56 is: 5,363.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,870.79 : 9,481.70 = 3,886.56 : x
  2. Step 2: Convert to fraction form
    6,870.79/9,481.70 = 3,886.56/x
  3. Step 3: Cross multiply
    6,870.79x = 9,481.70 × 3,886.56
  4. Step 4: Simplify right side
    6,870.79x = 36,851,194.30
  5. Step 5: Solve for x
    x = 36,851,194.30/6,870.79
  6. Step 6: Final answer
    x = 5,363.46

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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.