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Finding the Fourth Proportional to 13,108.56, 17,988.08 and 11,920.56

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Solution

The fourth proportional to 13,108.56, 17,988.08 and 11,920.56 is: 16,357.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.56 : 17,988.08 = 11,920.56 : x
  2. Step 2: Convert to fraction form
    13,108.56/17,988.08 = 11,920.56/x
  3. Step 3: Cross multiply
    13,108.56x = 17,988.08 × 11,920.56
  4. Step 4: Simplify right side
    13,108.56x = 214,427,927.32
  5. Step 5: Solve for x
    x = 214,427,927.32/13,108.56
  6. Step 6: Final answer
    x = 16,357.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.