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Finding the Fourth Proportional to 19,372.32, 26,732.88 and 11,918.88

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Solution

The fourth proportional to 19,372.32, 26,732.88 and 11,918.88 is: 16,447.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,372.32 : 26,732.88 = 11,918.88 : x
  2. Step 2: Convert to fraction form
    19,372.32/26,732.88 = 11,918.88/x
  3. Step 3: Cross multiply
    19,372.32x = 26,732.88 × 11,918.88
  4. Step 4: Simplify right side
    19,372.32x = 318,625,988.77
  5. Step 5: Solve for x
    x = 318,625,988.77/19,372.32
  6. Step 6: Final answer
    x = 16,447.49

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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.