Home / 5,320.40-7,979.99-1,425.12

Finding the Fourth Proportional to 5,320.40, 7,979.99 and 1,425.12

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Solution

The fourth proportional to 5,320.40, 7,979.99 and 1,425.12 is: 2,137.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.40 : 7,979.99 = 1,425.12 : x
  2. Step 2: Convert to fraction form
    5,320.40/7,979.99 = 1,425.12/x
  3. Step 3: Cross multiply
    5,320.40x = 7,979.99 × 1,425.12
  4. Step 4: Simplify right side
    5,320.40x = 11,372,443.35
  5. Step 5: Solve for x
    x = 11,372,443.35/5,320.40
  6. Step 6: Final answer
    x = 2,137.52

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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.