Home / 7,120.60-9,827-3,934.52

Finding the Fourth Proportional to 7,120.60, 9,827 and 3,934.52

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Solution

The fourth proportional to 7,120.60, 9,827 and 3,934.52 is: 5,429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.60 : 9,827 = 3,934.52 : x
  2. Step 2: Convert to fraction form
    7,120.60/9,827 = 3,934.52/x
  3. Step 3: Cross multiply
    7,120.60x = 9,827 × 3,934.52
  4. Step 4: Simplify right side
    7,120.60x = 38,664,528.04
  5. Step 5: Solve for x
    x = 38,664,528.04/7,120.60
  6. Step 6: Final answer
    x = 5,429.95

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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.