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Finding the Fourth Proportional to 15,179.51, 20,947.80 and 8,465.55

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Solution

The fourth proportional to 15,179.51, 20,947.80 and 8,465.55 is: 11,682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.51 : 20,947.80 = 8,465.55 : x
  2. Step 2: Convert to fraction form
    15,179.51/20,947.80 = 8,465.55/x
  3. Step 3: Cross multiply
    15,179.51x = 20,947.80 × 8,465.55
  4. Step 4: Simplify right side
    15,179.51x = 177,334,648.29
  5. Step 5: Solve for x
    x = 177,334,648.29/15,179.51
  6. Step 6: Final answer
    x = 11,682.51

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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.