Home / 7,121.68-9,827.18-4,138.14

Finding the Fourth Proportional to 7,121.68, 9,827.18 and 4,138.14

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Solution

The fourth proportional to 7,121.68, 9,827.18 and 4,138.14 is: 5,710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.68 : 9,827.18 = 4,138.14 : x
  2. Step 2: Convert to fraction form
    7,121.68/9,827.18 = 4,138.14/x
  3. Step 3: Cross multiply
    7,121.68x = 9,827.18 × 4,138.14
  4. Step 4: Simplify right side
    7,121.68x = 40,666,246.65
  5. Step 5: Solve for x
    x = 40,666,246.65/7,121.68
  6. Step 6: Final answer
    x = 5,710.20

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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.