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Finding the Fourth Proportional to 18,695.56, 28,053.66 and 10,807.78

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Solution

The fourth proportional to 18,695.56, 28,053.66 and 10,807.78 is: 16,217.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.56 : 28,053.66 = 10,807.78 : x
  2. Step 2: Convert to fraction form
    18,695.56/28,053.66 = 10,807.78/x
  3. Step 3: Cross multiply
    18,695.56x = 28,053.66 × 10,807.78
  4. Step 4: Simplify right side
    18,695.56x = 303,197,785.47
  5. Step 5: Solve for x
    x = 303,197,785.47/18,695.56
  6. Step 6: Final answer
    x = 16,217.64

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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.