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Finding the Fourth Proportional to 21,662.16, 29,889.87 and 12,587.93

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Solution

The fourth proportional to 21,662.16, 29,889.87 and 12,587.93 is: 17,369.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,662.16 : 29,889.87 = 12,587.93 : x
  2. Step 2: Convert to fraction form
    21,662.16/29,889.87 = 12,587.93/x
  3. Step 3: Cross multiply
    21,662.16x = 29,889.87 × 12,587.93
  4. Step 4: Simplify right side
    21,662.16x = 376,251,591.27
  5. Step 5: Solve for x
    x = 376,251,591.27/21,662.16
  6. Step 6: Final answer
    x = 17,369.07

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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.