Home / 2,809.48-3,876.28-1,689.86

Finding the Fourth Proportional to 2,809.48, 3,876.28 and 1,689.86

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Solution

The fourth proportional to 2,809.48, 3,876.28 and 1,689.86 is: 2,331.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.48 : 3,876.28 = 1,689.86 : x
  2. Step 2: Convert to fraction form
    2,809.48/3,876.28 = 1,689.86/x
  3. Step 3: Cross multiply
    2,809.48x = 3,876.28 × 1,689.86
  4. Step 4: Simplify right side
    2,809.48x = 6,550,370.12
  5. Step 5: Solve for x
    x = 6,550,370.12/2,809.48
  6. Step 6: Final answer
    x = 2,331.52

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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.