Home / 13,638.24-20,451.92-5,317.08

Finding the Fourth Proportional to 13,638.24, 20,451.92 and 5,317.08

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Solution

The fourth proportional to 13,638.24, 20,451.92 and 5,317.08 is: 7,973.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.24 : 20,451.92 = 5,317.08 : x
  2. Step 2: Convert to fraction form
    13,638.24/20,451.92 = 5,317.08/x
  3. Step 3: Cross multiply
    13,638.24x = 20,451.92 × 5,317.08
  4. Step 4: Simplify right side
    13,638.24x = 108,744,494.79
  5. Step 5: Solve for x
    x = 108,744,494.79/13,638.24
  6. Step 6: Final answer
    x = 7,973.50

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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.