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Finding the Fourth Proportional to 6,436.80, 8,883.13 and 3,918.51

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Solution

The fourth proportional to 6,436.80, 8,883.13 and 3,918.51 is: 5,407.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,436.80 : 8,883.13 = 3,918.51 : x
  2. Step 2: Convert to fraction form
    6,436.80/8,883.13 = 3,918.51/x
  3. Step 3: Cross multiply
    6,436.80x = 8,883.13 × 3,918.51
  4. Step 4: Simplify right side
    6,436.80x = 34,808,633.74
  5. Step 5: Solve for x
    x = 34,808,633.74/6,436.80
  6. Step 6: Final answer
    x = 5,407.75

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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.