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Finding the Fourth Proportional to 19,355.80, 29,012.10 and 9,992.20

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Solution

The fourth proportional to 19,355.80, 29,012.10 and 9,992.20 is: 14,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,355.80 : 29,012.10 = 9,992.20 : x
  2. Step 2: Convert to fraction form
    19,355.80/29,012.10 = 9,992.20/x
  3. Step 3: Cross multiply
    19,355.80x = 29,012.10 × 9,992.20
  4. Step 4: Simplify right side
    19,355.80x = 289,894,705.62
  5. Step 5: Solve for x
    x = 289,894,705.62/19,355.80
  6. Step 6: Final answer
    x = 14,977.15

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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.