Home / 5,103.72-7,651.13-1,981.58

Finding the Fourth Proportional to 5,103.72, 7,651.13 and 1,981.58

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Solution

The fourth proportional to 5,103.72, 7,651.13 and 1,981.58 is: 2,970.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,103.72 : 7,651.13 = 1,981.58 : x
  2. Step 2: Convert to fraction form
    5,103.72/7,651.13 = 1,981.58/x
  3. Step 3: Cross multiply
    5,103.72x = 7,651.13 × 1,981.58
  4. Step 4: Simplify right side
    5,103.72x = 15,161,278.02
  5. Step 5: Solve for x
    x = 15,161,278.02/5,103.72
  6. Step 6: Final answer
    x = 2,970.63

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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.