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Finding the Fourth Proportional to 18,751.76, 28,111.44 and 8,886

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Solution

The fourth proportional to 18,751.76, 28,111.44 and 8,886 is: 13,321.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.76 : 28,111.44 = 8,886 : x
  2. Step 2: Convert to fraction form
    18,751.76/28,111.44 = 8,886/x
  3. Step 3: Cross multiply
    18,751.76x = 28,111.44 × 8,886
  4. Step 4: Simplify right side
    18,751.76x = 249,798,255.84
  5. Step 5: Solve for x
    x = 249,798,255.84/18,751.76
  6. Step 6: Final answer
    x = 13,321.32

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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.