Home / 20,719.01-31,078.35-12,401.34

Finding the Fourth Proportional to 20,719.01, 31,078.35 and 12,401.34

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Solution

The fourth proportional to 20,719.01, 31,078.35 and 12,401.34 is: 18,601.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.01 : 31,078.35 = 12,401.34 : x
  2. Step 2: Convert to fraction form
    20,719.01/31,078.35 = 12,401.34/x
  3. Step 3: Cross multiply
    20,719.01x = 31,078.35 × 12,401.34
  4. Step 4: Simplify right side
    20,719.01x = 385,413,184.99
  5. Step 5: Solve for x
    x = 385,413,184.99/20,719.01
  6. Step 6: Final answer
    x = 18,601.92

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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.