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Finding the Fourth Proportional to 7,424.80, 11,139.12 and 2,495.20

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Solution

The fourth proportional to 7,424.80, 11,139.12 and 2,495.20 is: 3,743.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,424.80 : 11,139.12 = 2,495.20 : x
  2. Step 2: Convert to fraction form
    7,424.80/11,139.12 = 2,495.20/x
  3. Step 3: Cross multiply
    7,424.80x = 11,139.12 × 2,495.20
  4. Step 4: Simplify right side
    7,424.80x = 27,794,332.22
  5. Step 5: Solve for x
    x = 27,794,332.22/7,424.80
  6. Step 6: Final answer
    x = 3,743.45

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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.