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Finding the Fourth Proportional to 27,909.98, 38,515.98 and 15,163.28

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Solution

The fourth proportional to 27,909.98, 38,515.98 and 15,163.28 is: 20,925.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,909.98 : 38,515.98 = 15,163.28 : x
  2. Step 2: Convert to fraction form
    27,909.98/38,515.98 = 15,163.28/x
  3. Step 3: Cross multiply
    27,909.98x = 38,515.98 × 15,163.28
  4. Step 4: Simplify right side
    27,909.98x = 584,028,396.63
  5. Step 5: Solve for x
    x = 584,028,396.63/27,909.98
  6. Step 6: Final answer
    x = 20,925.44

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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.