Home / 2,915.98-4,022.90-1,921.74

Finding the Fourth Proportional to 2,915.98, 4,022.90 and 1,921.74

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Solution

The fourth proportional to 2,915.98, 4,022.90 and 1,921.74 is: 2,651.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.98 : 4,022.90 = 1,921.74 : x
  2. Step 2: Convert to fraction form
    2,915.98/4,022.90 = 1,921.74/x
  3. Step 3: Cross multiply
    2,915.98x = 4,022.90 × 1,921.74
  4. Step 4: Simplify right side
    2,915.98x = 7,730,967.85
  5. Step 5: Solve for x
    x = 7,730,967.85/2,915.98
  6. Step 6: Final answer
    x = 2,651.24

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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.