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Finding the Fourth Proportional to 15,179.88, 20,947.32 and 8,465.16

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Solution

The fourth proportional to 15,179.88, 20,947.32 and 8,465.16 is: 11,681.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.88 : 20,947.32 = 8,465.16 : x
  2. Step 2: Convert to fraction form
    15,179.88/20,947.32 = 8,465.16/x
  3. Step 3: Cross multiply
    15,179.88x = 20,947.32 × 8,465.16
  4. Step 4: Simplify right side
    15,179.88x = 177,322,415.37
  5. Step 5: Solve for x
    x = 177,322,415.37/15,179.88
  6. Step 6: Final answer
    x = 11,681.41

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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.