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Finding the Fourth Proportional to 11,399.45, 15,731.88 and 6,363.71

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Solution

The fourth proportional to 11,399.45, 15,731.88 and 6,363.71 is: 8,782.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,399.45 : 15,731.88 = 6,363.71 : x
  2. Step 2: Convert to fraction form
    11,399.45/15,731.88 = 6,363.71/x
  3. Step 3: Cross multiply
    11,399.45x = 15,731.88 × 6,363.71
  4. Step 4: Simplify right side
    11,399.45x = 100,113,171.51
  5. Step 5: Solve for x
    x = 100,113,171.51/11,399.45
  6. Step 6: Final answer
    x = 8,782.28

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1.5x scale

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.