Home / 13,424.40-20,138.40-5,631.36

Finding the Fourth Proportional to 13,424.40, 20,138.40 and 5,631.36

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Solution

The fourth proportional to 13,424.40, 20,138.40 and 5,631.36 is: 8,447.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.40 : 20,138.40 = 5,631.36 : x
  2. Step 2: Convert to fraction form
    13,424.40/20,138.40 = 5,631.36/x
  3. Step 3: Cross multiply
    13,424.40x = 20,138.40 × 5,631.36
  4. Step 4: Simplify right side
    13,424.40x = 113,406,580.22
  5. Step 5: Solve for x
    x = 113,406,580.22/13,424.40
  6. Step 6: Final answer
    x = 8,447.80

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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.