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Finding the Fourth Proportional to 12,008.15, 18,015.88 and 5,434.39

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Solution

The fourth proportional to 12,008.15, 18,015.88 and 5,434.39 is: 8,153.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.15 : 18,015.88 = 5,434.39 : x
  2. Step 2: Convert to fraction form
    12,008.15/18,015.88 = 5,434.39/x
  3. Step 3: Cross multiply
    12,008.15x = 18,015.88 × 5,434.39
  4. Step 4: Simplify right side
    12,008.15x = 97,905,318.11
  5. Step 5: Solve for x
    x = 97,905,318.11/12,008.15
  6. Step 6: Final answer
    x = 8,153.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.