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Finding the Fourth Proportional to 13,384.88, 20,079.16 and 4,620.48

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Solution

The fourth proportional to 13,384.88, 20,079.16 and 4,620.48 is: 6,931.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,384.88 : 20,079.16 = 4,620.48 : x
  2. Step 2: Convert to fraction form
    13,384.88/20,079.16 = 4,620.48/x
  3. Step 3: Cross multiply
    13,384.88x = 20,079.16 × 4,620.48
  4. Step 4: Simplify right side
    13,384.88x = 92,775,270.35
  5. Step 5: Solve for x
    x = 92,775,270.35/13,384.88
  6. Step 6: Final answer
    x = 6,931.35

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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.