Home / 13,408.74-20,120.40-5,623.02

Finding the Fourth Proportional to 13,408.74, 20,120.40 and 5,623.02

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Solution

The fourth proportional to 13,408.74, 20,120.40 and 5,623.02 is: 8,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.74 : 20,120.40 = 5,623.02 : x
  2. Step 2: Convert to fraction form
    13,408.74/20,120.40 = 5,623.02/x
  3. Step 3: Cross multiply
    13,408.74x = 20,120.40 × 5,623.02
  4. Step 4: Simplify right side
    13,408.74x = 113,137,411.61
  5. Step 5: Solve for x
    x = 113,137,411.61/13,408.74
  6. Step 6: Final answer
    x = 8,437.59

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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.