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Finding the Fourth Proportional to 9,904.12, 13,681.92 and 7,912.06

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Solution

The fourth proportional to 9,904.12, 13,681.92 and 7,912.06 is: 10,930.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,904.12 : 13,681.92 = 7,912.06 : x
  2. Step 2: Convert to fraction form
    9,904.12/13,681.92 = 7,912.06/x
  3. Step 3: Cross multiply
    9,904.12x = 13,681.92 × 7,912.06
  4. Step 4: Simplify right side
    9,904.12x = 108,252,171.96
  5. Step 5: Solve for x
    x = 108,252,171.96/9,904.12
  6. Step 6: Final answer
    x = 10,930.01

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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.