Home / 13,820.40-20,731.80-4,461.36

Finding the Fourth Proportional to 13,820.40, 20,731.80 and 4,461.36

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Solution

The fourth proportional to 13,820.40, 20,731.80 and 4,461.36 is: 6,692.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.40 : 20,731.80 = 4,461.36 : x
  2. Step 2: Convert to fraction form
    13,820.40/20,731.80 = 4,461.36/x
  3. Step 3: Cross multiply
    13,820.40x = 20,731.80 × 4,461.36
  4. Step 4: Simplify right side
    13,820.40x = 92,492,023.25
  5. Step 5: Solve for x
    x = 92,492,023.25/13,820.40
  6. Step 6: Final answer
    x = 6,692.43

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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.