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Finding the Fourth Proportional to 8,903.64, 13,423.07 and 8,427.36

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Solution

The fourth proportional to 8,903.64, 13,423.07 and 8,427.36 is: 12,705.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,903.64 : 13,423.07 = 8,427.36 : x
  2. Step 2: Convert to fraction form
    8,903.64/13,423.07 = 8,427.36/x
  3. Step 3: Cross multiply
    8,903.64x = 13,423.07 × 8,427.36
  4. Step 4: Simplify right side
    8,903.64x = 113,121,043.20
  5. Step 5: Solve for x
    x = 113,121,043.20/8,903.64
  6. Step 6: Final answer
    x = 12,705.03

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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.