Home / 19,779.20-29,654.40-8,086.40

Finding the Fourth Proportional to 19,779.20, 29,654.40 and 8,086.40

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Solution

The fourth proportional to 19,779.20, 29,654.40 and 8,086.40 is: 12,123.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.20 : 29,654.40 = 8,086.40 : x
  2. Step 2: Convert to fraction form
    19,779.20/29,654.40 = 8,086.40/x
  3. Step 3: Cross multiply
    19,779.20x = 29,654.40 × 8,086.40
  4. Step 4: Simplify right side
    19,779.20x = 239,797,340.16
  5. Step 5: Solve for x
    x = 239,797,340.16/19,779.20
  6. Step 6: Final answer
    x = 12,123.71

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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.