Home / 7,117.14-9,821.58-3,930.48

Finding the Fourth Proportional to 7,117.14, 9,821.58 and 3,930.48

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Solution

The fourth proportional to 7,117.14, 9,821.58 and 3,930.48 is: 5,424.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,117.14 : 9,821.58 = 3,930.48 : x
  2. Step 2: Convert to fraction form
    7,117.14/9,821.58 = 3,930.48/x
  3. Step 3: Cross multiply
    7,117.14x = 9,821.58 × 3,930.48
  4. Step 4: Simplify right side
    7,117.14x = 38,603,523.76
  5. Step 5: Solve for x
    x = 38,603,523.76/7,117.14
  6. Step 6: Final answer
    x = 5,424.02

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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.