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Finding the Fourth Proportional to 11,399.65, 15,731.53 and 6,363.86

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Solution

The fourth proportional to 11,399.65, 15,731.53 and 6,363.86 is: 8,782.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,399.65 : 15,731.53 = 6,363.86 : x
  2. Step 2: Convert to fraction form
    11,399.65/15,731.53 = 6,363.86/x
  3. Step 3: Cross multiply
    11,399.65x = 15,731.53 × 6,363.86
  4. Step 4: Simplify right side
    11,399.65x = 100,113,254.51
  5. Step 5: Solve for x
    x = 100,113,254.51/11,399.65
  6. Step 6: Final answer
    x = 8,782.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.