Home / 7,815.42-11,707.40-3,649.68

Finding the Fourth Proportional to 7,815.42, 11,707.40 and 3,649.68

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Solution

The fourth proportional to 7,815.42, 11,707.40 and 3,649.68 is: 5,467.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.42 : 11,707.40 = 3,649.68 : x
  2. Step 2: Convert to fraction form
    7,815.42/11,707.40 = 3,649.68/x
  3. Step 3: Cross multiply
    7,815.42x = 11,707.40 × 3,649.68
  4. Step 4: Simplify right side
    7,815.42x = 42,728,263.63
  5. Step 5: Solve for x
    x = 42,728,263.63/7,815.42
  6. Step 6: Final answer
    x = 5,467.17

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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.