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Finding the Fourth Proportional to 15,016.18, 20,723.12 and 8,643.74

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Solution

The fourth proportional to 15,016.18, 20,723.12 and 8,643.74 is: 11,928.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,016.18 : 20,723.12 = 8,643.74 : x
  2. Step 2: Convert to fraction form
    15,016.18/20,723.12 = 8,643.74/x
  3. Step 3: Cross multiply
    15,016.18x = 20,723.12 × 8,643.74
  4. Step 4: Simplify right side
    15,016.18x = 179,125,261.27
  5. Step 5: Solve for x
    x = 179,125,261.27/15,016.18
  6. Step 6: Final answer
    x = 11,928.82

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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.