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Finding the Fourth Proportional to 12,000.15, 17,985.65 and 7,305.39

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Solution

The fourth proportional to 12,000.15, 17,985.65 and 7,305.39 is: 10,949.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,000.15 : 17,985.65 = 7,305.39 : x
  2. Step 2: Convert to fraction form
    12,000.15/17,985.65 = 7,305.39/x
  3. Step 3: Cross multiply
    12,000.15x = 17,985.65 × 7,305.39
  4. Step 4: Simplify right side
    12,000.15x = 131,392,151.13
  5. Step 5: Solve for x
    x = 131,392,151.13/12,000.15
  6. Step 6: Final answer
    x = 10,949.21

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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.