Home / 5,320.50-7,980.75-1,424.81

Finding the Fourth Proportional to 5,320.50, 7,980.75 and 1,424.81

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Solution

The fourth proportional to 5,320.50, 7,980.75 and 1,424.81 is: 2,137.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.50 : 7,980.75 = 1,424.81 : x
  2. Step 2: Convert to fraction form
    5,320.50/7,980.75 = 1,424.81/x
  3. Step 3: Cross multiply
    5,320.50x = 7,980.75 × 1,424.81
  4. Step 4: Simplify right side
    5,320.50x = 11,371,052.41
  5. Step 5: Solve for x
    x = 11,371,052.41/5,320.50
  6. Step 6: Final answer
    x = 2,137.22

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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.