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Finding the Fourth Proportional to 22,559, 31,130.64 and 12,487.88

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Solution

The fourth proportional to 22,559, 31,130.64 and 12,487.88 is: 17,232.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,559 : 31,130.64 = 12,487.88 : x
  2. Step 2: Convert to fraction form
    22,559/31,130.64 = 12,487.88/x
  3. Step 3: Cross multiply
    22,559x = 31,130.64 × 12,487.88
  4. Step 4: Simplify right side
    22,559x = 388,755,696.64
  5. Step 5: Solve for x
    x = 388,755,696.64/22,559
  6. Step 6: Final answer
    x = 17,232.84

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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.