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Finding the Fourth Proportional to 6,854.57, 9,459.31 and 3,870.60

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Solution

The fourth proportional to 6,854.57, 9,459.31 and 3,870.60 is: 5,341.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,854.57 : 9,459.31 = 3,870.60 : x
  2. Step 2: Convert to fraction form
    6,854.57/9,459.31 = 3,870.60/x
  3. Step 3: Cross multiply
    6,854.57x = 9,459.31 × 3,870.60
  4. Step 4: Simplify right side
    6,854.57x = 36,613,171.96
  5. Step 5: Solve for x
    x = 36,613,171.96/6,854.57
  6. Step 6: Final answer
    x = 5,341.43

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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.