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Finding the Fourth Proportional to 18,763.66, 28,126.86 and 10,447.48

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Solution

The fourth proportional to 18,763.66, 28,126.86 and 10,447.48 is: 15,660.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.66 : 28,126.86 = 10,447.48 : x
  2. Step 2: Convert to fraction form
    18,763.66/28,126.86 = 10,447.48/x
  3. Step 3: Cross multiply
    18,763.66x = 28,126.86 × 10,447.48
  4. Step 4: Simplify right side
    18,763.66x = 293,854,807.31
  5. Step 5: Solve for x
    x = 293,854,807.31/18,763.66
  6. Step 6: Final answer
    x = 15,660.85

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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.