Home / 7,420.98-11,138.76-5,649.51

Finding the Fourth Proportional to 7,420.98, 11,138.76 and 5,649.51

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Solution

The fourth proportional to 7,420.98, 11,138.76 and 5,649.51 is: 8,479.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.98 : 11,138.76 = 5,649.51 : x
  2. Step 2: Convert to fraction form
    7,420.98/11,138.76 = 5,649.51/x
  3. Step 3: Cross multiply
    7,420.98x = 11,138.76 × 5,649.51
  4. Step 4: Simplify right side
    7,420.98x = 62,928,452.07
  5. Step 5: Solve for x
    x = 62,928,452.07/7,420.98
  6. Step 6: Final answer
    x = 8,479.81

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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.