Home / 19,639.78-29,469.06-9,779.92

Finding the Fourth Proportional to 19,639.78, 29,469.06 and 9,779.92

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Solution

The fourth proportional to 19,639.78, 29,469.06 and 9,779.92 is: 14,674.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.78 : 29,469.06 = 9,779.92 : x
  2. Step 2: Convert to fraction form
    19,639.78/29,469.06 = 9,779.92/x
  3. Step 3: Cross multiply
    19,639.78x = 29,469.06 × 9,779.92
  4. Step 4: Simplify right side
    19,639.78x = 288,205,049.28
  5. Step 5: Solve for x
    x = 288,205,049.28/19,639.78
  6. Step 6: Final answer
    x = 14,674.56

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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.