Home / 13,289.79-19,934.65-3,929.92

Finding the Fourth Proportional to 13,289.79, 19,934.65 and 3,929.92

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Solution

The fourth proportional to 13,289.79, 19,934.65 and 3,929.92 is: 5,894.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.79 : 19,934.65 = 3,929.92 : x
  2. Step 2: Convert to fraction form
    13,289.79/19,934.65 = 3,929.92/x
  3. Step 3: Cross multiply
    13,289.79x = 19,934.65 × 3,929.92
  4. Step 4: Simplify right side
    13,289.79x = 78,341,579.73
  5. Step 5: Solve for x
    x = 78,341,579.73/13,289.79
  6. Step 6: Final answer
    x = 5,894.87

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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.