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Finding the Fourth Proportional to 15,015.64, 20,723.13 and 8,642.47

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Solution

The fourth proportional to 15,015.64, 20,723.13 and 8,642.47 is: 11,927.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.64 : 20,723.13 = 8,642.47 : x
  2. Step 2: Convert to fraction form
    15,015.64/20,723.13 = 8,642.47/x
  3. Step 3: Cross multiply
    15,015.64x = 20,723.13 × 8,642.47
  4. Step 4: Simplify right side
    15,015.64x = 179,099,029.33
  5. Step 5: Solve for x
    x = 179,099,029.33/15,015.64
  6. Step 6: Final answer
    x = 11,927.50

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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.