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Finding the Fourth Proportional to 18,666.78, 25,760.15 and 10,283.28

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Solution

The fourth proportional to 18,666.78, 25,760.15 and 10,283.28 is: 14,190.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.78 : 25,760.15 = 10,283.28 : x
  2. Step 2: Convert to fraction form
    18,666.78/25,760.15 = 10,283.28/x
  3. Step 3: Cross multiply
    18,666.78x = 25,760.15 × 10,283.28
  4. Step 4: Simplify right side
    18,666.78x = 264,898,783.88
  5. Step 5: Solve for x
    x = 264,898,783.88/18,666.78
  6. Step 6: Final answer
    x = 14,190.92

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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.