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Finding the Fourth Proportional to 19,201.74, 28,807.48 and 8,102.72

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Solution

The fourth proportional to 19,201.74, 28,807.48 and 8,102.72 is: 12,156.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.74 : 28,807.48 = 8,102.72 : x
  2. Step 2: Convert to fraction form
    19,201.74/28,807.48 = 8,102.72/x
  3. Step 3: Cross multiply
    19,201.74x = 28,807.48 × 8,102.72
  4. Step 4: Simplify right side
    19,201.74x = 233,418,944.35
  5. Step 5: Solve for x
    x = 233,418,944.35/19,201.74
  6. Step 6: Final answer
    x = 12,156.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.