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Finding the Fourth Proportional to 6,871.12, 9,483.36 and 3,887.89

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Solution

The fourth proportional to 6,871.12, 9,483.36 and 3,887.89 is: 5,365.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,871.12 : 9,483.36 = 3,887.89 : x
  2. Step 2: Convert to fraction form
    6,871.12/9,483.36 = 3,887.89/x
  3. Step 3: Cross multiply
    6,871.12x = 9,483.36 × 3,887.89
  4. Step 4: Simplify right side
    6,871.12x = 36,870,260.51
  5. Step 5: Solve for x
    x = 36,870,260.51/6,871.12
  6. Step 6: Final answer
    x = 5,365.98

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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.