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Finding the Fourth Proportional to 36,700.40, 55,007.40 and 19,161.20

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Solution

The fourth proportional to 36,700.40, 55,007.40 and 19,161.20 is: 28,719.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,700.40 : 55,007.40 = 19,161.20 : x
  2. Step 2: Convert to fraction form
    36,700.40/55,007.40 = 19,161.20/x
  3. Step 3: Cross multiply
    36,700.40x = 55,007.40 × 19,161.20
  4. Step 4: Simplify right side
    36,700.40x = 1,054,007,792.88
  5. Step 5: Solve for x
    x = 1,054,007,792.88/36,700.40
  6. Step 6: Final answer
    x = 28,719.25

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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.