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Finding the Fourth Proportional to 11,866.19, 16,375.67 and 6,561.20

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Solution

The fourth proportional to 11,866.19, 16,375.67 and 6,561.20 is: 9,054.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,866.19 : 16,375.67 = 6,561.20 : x
  2. Step 2: Convert to fraction form
    11,866.19/16,375.67 = 6,561.20/x
  3. Step 3: Cross multiply
    11,866.19x = 16,375.67 × 6,561.20
  4. Step 4: Simplify right side
    11,866.19x = 107,443,931.32
  5. Step 5: Solve for x
    x = 107,443,931.32/11,866.19
  6. Step 6: Final answer
    x = 9,054.63

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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.