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Finding the Fourth Proportional to 22,779.81, 34,169.93 and 7,989.08

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Solution

The fourth proportional to 22,779.81, 34,169.93 and 7,989.08 is: 11,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,779.81 : 34,169.93 = 7,989.08 : x
  2. Step 2: Convert to fraction form
    22,779.81/34,169.93 = 7,989.08/x
  3. Step 3: Cross multiply
    22,779.81x = 34,169.93 × 7,989.08
  4. Step 4: Simplify right side
    22,779.81x = 272,986,238.91
  5. Step 5: Solve for x
    x = 272,986,238.91/22,779.81
  6. Step 6: Final answer
    x = 11,983.70

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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.