Home / 13,790.44-20,686.88-3,929.50

Finding the Fourth Proportional to 13,790.44, 20,686.88 and 3,929.50

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Solution

The fourth proportional to 13,790.44, 20,686.88 and 3,929.50 is: 5,894.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.44 : 20,686.88 = 3,929.50 : x
  2. Step 2: Convert to fraction form
    13,790.44/20,686.88 = 3,929.50/x
  3. Step 3: Cross multiply
    13,790.44x = 20,686.88 × 3,929.50
  4. Step 4: Simplify right side
    13,790.44x = 81,289,094.96
  5. Step 5: Solve for x
    x = 81,289,094.96/13,790.44
  6. Step 6: Final answer
    x = 5,894.60

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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.