Home / 12,821.20-19,207.20-9,885.04

Finding the Fourth Proportional to 12,821.20, 19,207.20 and 9,885.04

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Solution

The fourth proportional to 12,821.20, 19,207.20 and 9,885.04 is: 14,808.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.20 : 19,207.20 = 9,885.04 : x
  2. Step 2: Convert to fraction form
    12,821.20/19,207.20 = 9,885.04/x
  3. Step 3: Cross multiply
    12,821.20x = 19,207.20 × 9,885.04
  4. Step 4: Simplify right side
    12,821.20x = 189,863,940.29
  5. Step 5: Solve for x
    x = 189,863,940.29/12,821.20
  6. Step 6: Final answer
    x = 14,808.59

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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.