Home / 20,809.76-31,252.21-19,140.91

Finding the Fourth Proportional to 20,809.76, 31,252.21 and 19,140.91

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Solution

The fourth proportional to 20,809.76, 31,252.21 and 19,140.91 is: 28,745.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.76 : 31,252.21 = 19,140.91 : x
  2. Step 2: Convert to fraction form
    20,809.76/31,252.21 = 19,140.91/x
  3. Step 3: Cross multiply
    20,809.76x = 31,252.21 × 19,140.91
  4. Step 4: Simplify right side
    20,809.76x = 598,195,612.93
  5. Step 5: Solve for x
    x = 598,195,612.93/20,809.76
  6. Step 6: Final answer
    x = 28,745.92

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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.