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Finding the Fourth Proportional to 11,289.78, 16,890.93 and 7,574.31

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Solution

The fourth proportional to 11,289.78, 16,890.93 and 7,574.31 is: 11,332.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,289.78 : 16,890.93 = 7,574.31 : x
  2. Step 2: Convert to fraction form
    11,289.78/16,890.93 = 7,574.31/x
  3. Step 3: Cross multiply
    11,289.78x = 16,890.93 × 7,574.31
  4. Step 4: Simplify right side
    11,289.78x = 127,937,140.01
  5. Step 5: Solve for x
    x = 127,937,140.01/11,289.78
  6. Step 6: Final answer
    x = 11,332.12

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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.