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Finding the Fourth Proportional to 6,854.88, 9,459.21 and 3,870.98

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Solution

The fourth proportional to 6,854.88, 9,459.21 and 3,870.98 is: 5,341.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,854.88 : 9,459.21 = 3,870.98 : x
  2. Step 2: Convert to fraction form
    6,854.88/9,459.21 = 3,870.98/x
  3. Step 3: Cross multiply
    6,854.88x = 9,459.21 × 3,870.98
  4. Step 4: Simplify right side
    6,854.88x = 36,616,412.73
  5. Step 5: Solve for x
    x = 36,616,412.73/6,854.88
  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.