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Finding the Fourth Proportional to 15,777.44, 21,772.02 and 8,702.48

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Solution

The fourth proportional to 15,777.44, 21,772.02 and 8,702.48 is: 12,008.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.44 : 21,772.02 = 8,702.48 : x
  2. Step 2: Convert to fraction form
    15,777.44/21,772.02 = 8,702.48/x
  3. Step 3: Cross multiply
    15,777.44x = 21,772.02 × 8,702.48
  4. Step 4: Simplify right side
    15,777.44x = 189,470,568.61
  5. Step 5: Solve for x
    x = 189,470,568.61/15,777.44
  6. Step 6: Final answer
    x = 12,008.96

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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.