Home / 13,778.01-20,666.30-3,915.99

Finding the Fourth Proportional to 13,778.01, 20,666.30 and 3,915.99

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Solution

The fourth proportional to 13,778.01, 20,666.30 and 3,915.99 is: 5,873.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.01 : 20,666.30 = 3,915.99 : x
  2. Step 2: Convert to fraction form
    13,778.01/20,666.30 = 3,915.99/x
  3. Step 3: Cross multiply
    13,778.01x = 20,666.30 × 3,915.99
  4. Step 4: Simplify right side
    13,778.01x = 80,929,004.56
  5. Step 5: Solve for x
    x = 80,929,004.56/13,778.01
  6. Step 6: Final answer
    x = 5,873.78

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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.