Home / 2,915.16-4,020.44-1,970.70

Finding the Fourth Proportional to 2,915.16, 4,020.44 and 1,970.70

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Solution

The fourth proportional to 2,915.16, 4,020.44 and 1,970.70 is: 2,717.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.16 : 4,020.44 = 1,970.70 : x
  2. Step 2: Convert to fraction form
    2,915.16/4,020.44 = 1,970.70/x
  3. Step 3: Cross multiply
    2,915.16x = 4,020.44 × 1,970.70
  4. Step 4: Simplify right side
    2,915.16x = 7,923,071.25
  5. Step 5: Solve for x
    x = 7,923,071.25/2,915.16
  6. Step 6: Final answer
    x = 2,717.89

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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.