Home / 5,424.91-8,137.30-1,320.91

Finding the Fourth Proportional to 5,424.91, 8,137.30 and 1,320.91

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Solution

The fourth proportional to 5,424.91, 8,137.30 and 1,320.91 is: 1,981.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,424.91 : 8,137.30 = 1,320.91 : x
  2. Step 2: Convert to fraction form
    5,424.91/8,137.30 = 1,320.91/x
  3. Step 3: Cross multiply
    5,424.91x = 8,137.30 × 1,320.91
  4. Step 4: Simplify right side
    5,424.91x = 10,748,593.65
  5. Step 5: Solve for x
    x = 10,748,593.65/5,424.91
  6. Step 6: Final answer
    x = 1,981.34

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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.