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Finding the Fourth Proportional to 7,368.78, 11,053.08 and 2,986.20

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Solution

The fourth proportional to 7,368.78, 11,053.08 and 2,986.20 is: 4,479.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,368.78 : 11,053.08 = 2,986.20 : x
  2. Step 2: Convert to fraction form
    7,368.78/11,053.08 = 2,986.20/x
  3. Step 3: Cross multiply
    7,368.78x = 11,053.08 × 2,986.20
  4. Step 4: Simplify right side
    7,368.78x = 33,006,707.50
  5. Step 5: Solve for x
    x = 33,006,707.50/7,368.78
  6. Step 6: Final answer
    x = 4,479.26

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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.