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Finding the Fourth Proportional to 18,128.78, 27,192.07 and 10,780.01

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Solution

The fourth proportional to 18,128.78, 27,192.07 and 10,780.01 is: 16,169.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.78 : 27,192.07 = 10,780.01 : x
  2. Step 2: Convert to fraction form
    18,128.78/27,192.07 = 10,780.01/x
  3. Step 3: Cross multiply
    18,128.78x = 27,192.07 × 10,780.01
  4. Step 4: Simplify right side
    18,128.78x = 293,130,596.66
  5. Step 5: Solve for x
    x = 293,130,596.66/18,128.78
  6. Step 6: Final answer
    x = 16,169.35

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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.