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Finding the Fourth Proportional to 6,854.79, 9,459.92 and 3,870.65

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Solution

The fourth proportional to 6,854.79, 9,459.92 and 3,870.65 is: 5,341.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,854.79 : 9,459.92 = 3,870.65 : x
  2. Step 2: Convert to fraction form
    6,854.79/9,459.92 = 3,870.65/x
  3. Step 3: Cross multiply
    6,854.79x = 9,459.92 × 3,870.65
  4. Step 4: Simplify right side
    6,854.79x = 36,615,972.70
  5. Step 5: Solve for x
    x = 36,615,972.70/6,854.79
  6. Step 6: Final answer
    x = 5,341.66

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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.