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Finding the Fourth Proportional to 7,871.70, 11,807.55 and 2,677.59

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Solution

The fourth proportional to 7,871.70, 11,807.55 and 2,677.59 is: 4,016.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.70 : 11,807.55 = 2,677.59 : x
  2. Step 2: Convert to fraction form
    7,871.70/11,807.55 = 2,677.59/x
  3. Step 3: Cross multiply
    7,871.70x = 11,807.55 × 2,677.59
  4. Step 4: Simplify right side
    7,871.70x = 31,615,777.80
  5. Step 5: Solve for x
    x = 31,615,777.80/7,871.70
  6. Step 6: Final answer
    x = 4,016.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.