Home / 2,916.90-4,020.60-1,972.38

Finding the Fourth Proportional to 2,916.90, 4,020.60 and 1,972.38

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Solution

The fourth proportional to 2,916.90, 4,020.60 and 1,972.38 is: 2,718.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916.90 : 4,020.60 = 1,972.38 : x
  2. Step 2: Convert to fraction form
    2,916.90/4,020.60 = 1,972.38/x
  3. Step 3: Cross multiply
    2,916.90x = 4,020.60 × 1,972.38
  4. Step 4: Simplify right side
    2,916.90x = 7,930,151.03
  5. Step 5: Solve for x
    x = 7,930,151.03/2,916.90
  6. Step 6: Final answer
    x = 2,718.69

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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.