Home / 7,116.12-9,819.77-3,928.91

Finding the Fourth Proportional to 7,116.12, 9,819.77 and 3,928.91

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Solution

The fourth proportional to 7,116.12, 9,819.77 and 3,928.91 is: 5,421.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,116.12 : 9,819.77 = 3,928.91 : x
  2. Step 2: Convert to fraction form
    7,116.12/9,819.77 = 3,928.91/x
  3. Step 3: Cross multiply
    7,116.12x = 9,819.77 × 3,928.91
  4. Step 4: Simplify right side
    7,116.12x = 38,580,923.81
  5. Step 5: Solve for x
    x = 38,580,923.81/7,116.12
  6. Step 6: Final answer
    x = 5,421.62

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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.