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Finding the Fourth Proportional to 18,739.22, 28,117.94 and 8,866.73

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Solution

The fourth proportional to 18,739.22, 28,117.94 and 8,866.73 is: 13,304.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.22 : 28,117.94 = 8,866.73 : x
  2. Step 2: Convert to fraction form
    18,739.22/28,117.94 = 8,866.73/x
  3. Step 3: Cross multiply
    18,739.22x = 28,117.94 × 8,866.73
  4. Step 4: Simplify right side
    18,739.22x = 249,314,208.10
  5. Step 5: Solve for x
    x = 249,314,208.10/18,739.22
  6. Step 6: Final answer
    x = 13,304.41

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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.