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Finding the Fourth Proportional to 11,887.66, 16,395.01 and 7,639.41

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Solution

The fourth proportional to 11,887.66, 16,395.01 and 7,639.41 is: 10,535.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887.66 : 16,395.01 = 7,639.41 : x
  2. Step 2: Convert to fraction form
    11,887.66/16,395.01 = 7,639.41/x
  3. Step 3: Cross multiply
    11,887.66x = 16,395.01 × 7,639.41
  4. Step 4: Simplify right side
    11,887.66x = 125,248,203.34
  5. Step 5: Solve for x
    x = 125,248,203.34/11,887.66
  6. Step 6: Final answer
    x = 10,535.98

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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.