Home / 2,920.61-4,031.21-1,872.11

Finding the Fourth Proportional to 2,920.61, 4,031.21 and 1,872.11

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Solution

The fourth proportional to 2,920.61, 4,031.21 and 1,872.11 is: 2,584.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.61 : 4,031.21 = 1,872.11 : x
  2. Step 2: Convert to fraction form
    2,920.61/4,031.21 = 1,872.11/x
  3. Step 3: Cross multiply
    2,920.61x = 4,031.21 × 1,872.11
  4. Step 4: Simplify right side
    2,920.61x = 7,546,868.55
  5. Step 5: Solve for x
    x = 7,546,868.55/2,920.61
  6. Step 6: Final answer
    x = 2,584.00

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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.