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Finding the Fourth Proportional to 18,666.80, 25,760.18 and 10,283.30

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Solution

The fourth proportional to 18,666.80, 25,760.18 and 10,283.30 is: 14,190.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.80 : 25,760.18 = 10,283.30 : x
  2. Step 2: Convert to fraction form
    18,666.80/25,760.18 = 10,283.30/x
  3. Step 3: Cross multiply
    18,666.80x = 25,760.18 × 10,283.30
  4. Step 4: Simplify right side
    18,666.80x = 264,899,478.78
  5. Step 5: Solve for x
    x = 264,899,478.78/18,666.80
  6. Step 6: Final answer
    x = 14,190.95

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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.