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Finding the Fourth Proportional to 15,015.78, 20,723.06 and 8,727.75

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Solution

The fourth proportional to 15,015.78, 20,723.06 and 8,727.75 is: 12,045.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.78 : 20,723.06 = 8,727.75 : x
  2. Step 2: Convert to fraction form
    15,015.78/20,723.06 = 8,727.75/x
  3. Step 3: Cross multiply
    15,015.78x = 20,723.06 × 8,727.75
  4. Step 4: Simplify right side
    15,015.78x = 180,865,643.28
  5. Step 5: Solve for x
    x = 180,865,643.28/15,015.78
  6. Step 6: Final answer
    x = 12,045.04

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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.