Home / 2,988.72-4,126.50-1,811.88

Finding the Fourth Proportional to 2,988.72, 4,126.50 and 1,811.88

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Solution

The fourth proportional to 2,988.72, 4,126.50 and 1,811.88 is: 2,501.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.72 : 4,126.50 = 1,811.88 : x
  2. Step 2: Convert to fraction form
    2,988.72/4,126.50 = 1,811.88/x
  3. Step 3: Cross multiply
    2,988.72x = 4,126.50 × 1,811.88
  4. Step 4: Simplify right side
    2,988.72x = 7,476,722.82
  5. Step 5: Solve for x
    x = 7,476,722.82/2,988.72
  6. Step 6: Final answer
    x = 2,501.65

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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.