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Finding the Fourth Proportional to 13,659.42, 20,502.48 and 7,001.22

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Solution

The fourth proportional to 13,659.42, 20,502.48 and 7,001.22 is: 10,508.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.42 : 20,502.48 = 7,001.22 : x
  2. Step 2: Convert to fraction form
    13,659.42/20,502.48 = 7,001.22/x
  3. Step 3: Cross multiply
    13,659.42x = 20,502.48 × 7,001.22
  4. Step 4: Simplify right side
    13,659.42x = 143,542,373.03
  5. Step 5: Solve for x
    x = 143,542,373.03/13,659.42
  6. Step 6: Final answer
    x = 10,508.67

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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.