Home / 7,513.80-11,275.68-3,131.28

Finding the Fourth Proportional to 7,513.80, 11,275.68 and 3,131.28

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Solution

The fourth proportional to 7,513.80, 11,275.68 and 3,131.28 is: 4,699.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,513.80 : 11,275.68 = 3,131.28 : x
  2. Step 2: Convert to fraction form
    7,513.80/11,275.68 = 3,131.28/x
  3. Step 3: Cross multiply
    7,513.80x = 11,275.68 × 3,131.28
  4. Step 4: Simplify right side
    7,513.80x = 35,307,311.27
  5. Step 5: Solve for x
    x = 35,307,311.27/7,513.80
  6. Step 6: Final answer
    x = 4,699.00

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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.