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Finding the Fourth Proportional to 21,631, 29,823.74 and 18,051.12

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Solution

The fourth proportional to 21,631, 29,823.74 and 18,051.12 is: 24,887.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631 : 29,823.74 = 18,051.12 : x
  2. Step 2: Convert to fraction form
    21,631/29,823.74 = 18,051.12/x
  3. Step 3: Cross multiply
    21,631x = 29,823.74 × 18,051.12
  4. Step 4: Simplify right side
    21,631x = 538,351,670.21
  5. Step 5: Solve for x
    x = 538,351,670.21/21,631
  6. Step 6: Final answer
    x = 24,887.97

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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.