Home / 2,815.17-3,881.29-1,929.39

Finding the Fourth Proportional to 2,815.17, 3,881.29 and 1,929.39

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Solution

The fourth proportional to 2,815.17, 3,881.29 and 1,929.39 is: 2,660.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.17 : 3,881.29 = 1,929.39 : x
  2. Step 2: Convert to fraction form
    2,815.17/3,881.29 = 1,929.39/x
  3. Step 3: Cross multiply
    2,815.17x = 3,881.29 × 1,929.39
  4. Step 4: Simplify right side
    2,815.17x = 7,488,522.11
  5. Step 5: Solve for x
    x = 7,488,522.11/2,815.17
  6. Step 6: Final answer
    x = 2,660.06

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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.