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Finding the Fourth Proportional to 8,904.64, 13,424.58 and 8,428.36

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Solution

The fourth proportional to 8,904.64, 13,424.58 and 8,428.36 is: 12,706.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,904.64 : 13,424.58 = 8,428.36 : x
  2. Step 2: Convert to fraction form
    8,904.64/13,424.58 = 8,428.36/x
  3. Step 3: Cross multiply
    8,904.64x = 13,424.58 × 8,428.36
  4. Step 4: Simplify right side
    8,904.64x = 113,147,193.09
  5. Step 5: Solve for x
    x = 113,147,193.09/8,904.64
  6. Step 6: Final answer
    x = 12,706.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.