Home / 2,915.80-4,368.30-2,721.40

Finding the Fourth Proportional to 2,915.80, 4,368.30 and 2,721.40

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Solution

The fourth proportional to 2,915.80, 4,368.30 and 2,721.40 is: 4,077.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.80 : 4,368.30 = 2,721.40 : x
  2. Step 2: Convert to fraction form
    2,915.80/4,368.30 = 2,721.40/x
  3. Step 3: Cross multiply
    2,915.80x = 4,368.30 × 2,721.40
  4. Step 4: Simplify right side
    2,915.80x = 11,887,891.62
  5. Step 5: Solve for x
    x = 11,887,891.62/2,915.80
  6. Step 6: Final answer
    x = 4,077.06

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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.