Home / 3,666.21-5,059.36-1,987.61

Finding the Fourth Proportional to 3,666.21, 5,059.36 and 1,987.61

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Solution

The fourth proportional to 3,666.21, 5,059.36 and 1,987.61 is: 2,742.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,666.21 : 5,059.36 = 1,987.61 : x
  2. Step 2: Convert to fraction form
    3,666.21/5,059.36 = 1,987.61/x
  3. Step 3: Cross multiply
    3,666.21x = 5,059.36 × 1,987.61
  4. Step 4: Simplify right side
    3,666.21x = 10,056,011.72
  5. Step 5: Solve for x
    x = 10,056,011.72/3,666.21
  6. Step 6: Final answer
    x = 2,742.89

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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.