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Finding the Fourth Proportional to 28,197.98, 38,913.22 and 15,451.06

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Solution

The fourth proportional to 28,197.98, 38,913.22 and 15,451.06 is: 21,322.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,197.98 : 38,913.22 = 15,451.06 : x
  2. Step 2: Convert to fraction form
    28,197.98/38,913.22 = 15,451.06/x
  3. Step 3: Cross multiply
    28,197.98x = 38,913.22 × 15,451.06
  4. Step 4: Simplify right side
    28,197.98x = 601,250,399.73
  5. Step 5: Solve for x
    x = 601,250,399.73/28,197.98
  6. Step 6: Final answer
    x = 21,322.46

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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.