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Finding the Fourth Proportional to 19,895.40, 29,843.10 and 19,780.20

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Solution

The fourth proportional to 19,895.40, 29,843.10 and 19,780.20 is: 29,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,895.40 : 29,843.10 = 19,780.20 : x
  2. Step 2: Convert to fraction form
    19,895.40/29,843.10 = 19,780.20/x
  3. Step 3: Cross multiply
    19,895.40x = 29,843.10 × 19,780.20
  4. Step 4: Simplify right side
    19,895.40x = 590,302,486.62
  5. Step 5: Solve for x
    x = 590,302,486.62/19,895.40
  6. Step 6: Final answer
    x = 29,670.30

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Similar ratio
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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.