Home / 13,157.20-19,740.40-8,221.04

Finding the Fourth Proportional to 13,157.20, 19,740.40 and 8,221.04

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Solution

The fourth proportional to 13,157.20, 19,740.40 and 8,221.04 is: 12,334.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.20 : 19,740.40 = 8,221.04 : x
  2. Step 2: Convert to fraction form
    13,157.20/19,740.40 = 8,221.04/x
  3. Step 3: Cross multiply
    13,157.20x = 19,740.40 × 8,221.04
  4. Step 4: Simplify right side
    13,157.20x = 162,286,618.02
  5. Step 5: Solve for x
    x = 162,286,618.02/13,157.20
  6. Step 6: Final answer
    x = 12,334.43

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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.