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Finding the Fourth Proportional to 18,837.36, 25,978.08 and 12,111.12

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Solution

The fourth proportional to 18,837.36, 25,978.08 and 12,111.12 is: 16,702.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,837.36 : 25,978.08 = 12,111.12 : x
  2. Step 2: Convert to fraction form
    18,837.36/25,978.08 = 12,111.12/x
  3. Step 3: Cross multiply
    18,837.36x = 25,978.08 × 12,111.12
  4. Step 4: Simplify right side
    18,837.36x = 314,623,644.25
  5. Step 5: Solve for x
    x = 314,623,644.25/18,837.36
  6. Step 6: Final answer
    x = 16,702.11

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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.