Home / 6,819.90-9,411.58-3,987.51

Finding the Fourth Proportional to 6,819.90, 9,411.58 and 3,987.51

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Solution

The fourth proportional to 6,819.90, 9,411.58 and 3,987.51 is: 5,502.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,819.90 : 9,411.58 = 3,987.51 : x
  2. Step 2: Convert to fraction form
    6,819.90/9,411.58 = 3,987.51/x
  3. Step 3: Cross multiply
    6,819.90x = 9,411.58 × 3,987.51
  4. Step 4: Simplify right side
    6,819.90x = 37,528,769.37
  5. Step 5: Solve for x
    x = 37,528,769.37/6,819.90
  6. Step 6: Final answer
    x = 5,502.83

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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.