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Finding the Fourth Proportional to 15,198.63, 20,970.41 and 8,909.79

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Solution

The fourth proportional to 15,198.63, 20,970.41 and 8,909.79 is: 12,293.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,198.63 : 20,970.41 = 8,909.79 : x
  2. Step 2: Convert to fraction form
    15,198.63/20,970.41 = 8,909.79/x
  3. Step 3: Cross multiply
    15,198.63x = 20,970.41 × 8,909.79
  4. Step 4: Simplify right side
    15,198.63x = 186,841,826.13
  5. Step 5: Solve for x
    x = 186,841,826.13/15,198.63
  6. Step 6: Final answer
    x = 12,293.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.