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Finding the Fourth Proportional to 15,727.96, 21,702.66 and 8,653.96

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Solution

The fourth proportional to 15,727.96, 21,702.66 and 8,653.96 is: 11,941.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,727.96 : 21,702.66 = 8,653.96 : x
  2. Step 2: Convert to fraction form
    15,727.96/21,702.66 = 8,653.96/x
  3. Step 3: Cross multiply
    15,727.96x = 21,702.66 × 8,653.96
  4. Step 4: Simplify right side
    15,727.96x = 187,813,951.53
  5. Step 5: Solve for x
    x = 187,813,951.53/15,727.96
  6. Step 6: Final answer
    x = 11,941.41

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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.