Home / 2,113.92-3,172.20-1,521

Finding the Fourth Proportional to 2,113.92, 3,172.20 and 1,521

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Solution

The fourth proportional to 2,113.92, 3,172.20 and 1,521 is: 2,282.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.92 : 3,172.20 = 1,521 : x
  2. Step 2: Convert to fraction form
    2,113.92/3,172.20 = 1,521/x
  3. Step 3: Cross multiply
    2,113.92x = 3,172.20 × 1,521
  4. Step 4: Simplify right side
    2,113.92x = 4,824,916.20
  5. Step 5: Solve for x
    x = 4,824,916.20/2,113.92
  6. Step 6: Final answer
    x = 2,282.45

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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.