Home / 5,120.70-7,681.16-1,422.91

Finding the Fourth Proportional to 5,120.70, 7,681.16 and 1,422.91

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Solution

The fourth proportional to 5,120.70, 7,681.16 and 1,422.91 is: 2,134.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.70 : 7,681.16 = 1,422.91 : x
  2. Step 2: Convert to fraction form
    5,120.70/7,681.16 = 1,422.91/x
  3. Step 3: Cross multiply
    5,120.70x = 7,681.16 × 1,422.91
  4. Step 4: Simplify right side
    5,120.70x = 10,929,599.38
  5. Step 5: Solve for x
    x = 10,929,599.38/5,120.70
  6. Step 6: Final answer
    x = 2,134.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.