Home / 13,820.98-20,731.36-6,421.32

Finding the Fourth Proportional to 13,820.98, 20,731.36 and 6,421.32

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Solution

The fourth proportional to 13,820.98, 20,731.36 and 6,421.32 is: 9,631.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.98 : 20,731.36 = 6,421.32 : x
  2. Step 2: Convert to fraction form
    13,820.98/20,731.36 = 6,421.32/x
  3. Step 3: Cross multiply
    13,820.98x = 20,731.36 × 6,421.32
  4. Step 4: Simplify right side
    13,820.98x = 133,122,696.60
  5. Step 5: Solve for x
    x = 133,122,696.60/13,820.98
  6. Step 6: Final answer
    x = 9,631.93

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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.