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Finding the Fourth Proportional to 19,855.20, 29,741.40 and 9,334.20

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Solution

The fourth proportional to 19,855.20, 29,741.40 and 9,334.20 is: 13,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.20 : 29,741.40 = 9,334.20 : x
  2. Step 2: Convert to fraction form
    19,855.20/29,741.40 = 9,334.20/x
  3. Step 3: Cross multiply
    19,855.20x = 29,741.40 × 9,334.20
  4. Step 4: Simplify right side
    19,855.20x = 277,612,175.88
  5. Step 5: Solve for x
    x = 277,612,175.88/19,855.20
  6. Step 6: Final answer
    x = 13,981.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.