Home / 2,856.69-3,929.85-2,518.92

Finding the Fourth Proportional to 2,856.69, 3,929.85 and 2,518.92

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Solution

The fourth proportional to 2,856.69, 3,929.85 and 2,518.92 is: 3,465.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.69 : 3,929.85 = 2,518.92 : x
  2. Step 2: Convert to fraction form
    2,856.69/3,929.85 = 2,518.92/x
  3. Step 3: Cross multiply
    2,856.69x = 3,929.85 × 2,518.92
  4. Step 4: Simplify right side
    2,856.69x = 9,898,977.76
  5. Step 5: Solve for x
    x = 9,898,977.76/2,856.69
  6. Step 6: Final answer
    x = 3,465.19

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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.