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Finding the Fourth Proportional to 18,666.88, 25,740.48 and 16,786.24

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Solution

The fourth proportional to 18,666.88, 25,740.48 and 16,786.24 is: 23,147.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.88 : 25,740.48 = 16,786.24 : x
  2. Step 2: Convert to fraction form
    18,666.88/25,740.48 = 16,786.24/x
  3. Step 3: Cross multiply
    18,666.88x = 25,740.48 × 16,786.24
  4. Step 4: Simplify right side
    18,666.88x = 432,085,875.00
  5. Step 5: Solve for x
    x = 432,085,875.00/18,666.88
  6. Step 6: Final answer
    x = 23,147.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.