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Finding the Fourth Proportional to 9,900.81, 13,663.11 and 5,921.92

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Solution

The fourth proportional to 9,900.81, 13,663.11 and 5,921.92 is: 8,172.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,900.81 : 13,663.11 = 5,921.92 : x
  2. Step 2: Convert to fraction form
    9,900.81/13,663.11 = 5,921.92/x
  3. Step 3: Cross multiply
    9,900.81x = 13,663.11 × 5,921.92
  4. Step 4: Simplify right side
    9,900.81x = 80,911,844.37
  5. Step 5: Solve for x
    x = 80,911,844.37/9,900.81
  6. Step 6: Final answer
    x = 8,172.24

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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.