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Finding the Fourth Proportional to 13,340.16, 20,001.60 and 6,408

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Solution

The fourth proportional to 13,340.16, 20,001.60 and 6,408 is: 9,607.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,340.16 : 20,001.60 = 6,408 : x
  2. Step 2: Convert to fraction form
    13,340.16/20,001.60 = 6,408/x
  3. Step 3: Cross multiply
    13,340.16x = 20,001.60 × 6,408
  4. Step 4: Simplify right side
    13,340.16x = 128,170,252.80
  5. Step 5: Solve for x
    x = 128,170,252.80/13,340.16
  6. Step 6: Final answer
    x = 9,607.85

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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.