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Finding the Fourth Proportional to 36,870, 55,305.21 and 9,168

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Solution

The fourth proportional to 36,870, 55,305.21 and 9,168 is: 13,752.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,870 : 55,305.21 = 9,168 : x
  2. Step 2: Convert to fraction form
    36,870/55,305.21 = 9,168/x
  3. Step 3: Cross multiply
    36,870x = 55,305.21 × 9,168
  4. Step 4: Simplify right side
    36,870x = 507,038,165.28
  5. Step 5: Solve for x
    x = 507,038,165.28/36,870
  6. Step 6: Final answer
    x = 13,752.05

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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.