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Finding the Fourth Proportional to 8,633.36, 11,921.51 and 8,190.50

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Solution

The fourth proportional to 8,633.36, 11,921.51 and 8,190.50 is: 11,309.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,633.36 : 11,921.51 = 8,190.50 : x
  2. Step 2: Convert to fraction form
    8,633.36/11,921.51 = 8,190.50/x
  3. Step 3: Cross multiply
    8,633.36x = 11,921.51 × 8,190.50
  4. Step 4: Simplify right side
    8,633.36x = 97,643,127.66
  5. Step 5: Solve for x
    x = 97,643,127.66/8,633.36
  6. Step 6: Final answer
    x = 11,309.98

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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.