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Finding the Fourth Proportional to 18,698.31, 28,053.17 and 11,210.19

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Solution

The fourth proportional to 18,698.31, 28,053.17 and 11,210.19 is: 16,818.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.31 : 28,053.17 = 11,210.19 : x
  2. Step 2: Convert to fraction form
    18,698.31/28,053.17 = 11,210.19/x
  3. Step 3: Cross multiply
    18,698.31x = 28,053.17 × 11,210.19
  4. Step 4: Simplify right side
    18,698.31x = 314,481,365.80
  5. Step 5: Solve for x
    x = 314,481,365.80/18,698.31
  6. Step 6: Final answer
    x = 16,818.71

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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.