Home / 13,289.24-19,937.13-3,929.21

Finding the Fourth Proportional to 13,289.24, 19,937.13 and 3,929.21

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Solution

The fourth proportional to 13,289.24, 19,937.13 and 3,929.21 is: 5,894.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.24 : 19,937.13 = 3,929.21 : x
  2. Step 2: Convert to fraction form
    13,289.24/19,937.13 = 3,929.21/x
  3. Step 3: Cross multiply
    13,289.24x = 19,937.13 × 3,929.21
  4. Step 4: Simplify right side
    13,289.24x = 78,337,170.57
  5. Step 5: Solve for x
    x = 78,337,170.57/13,289.24
  6. Step 6: Final answer
    x = 5,894.78

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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.