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Finding the Fourth Proportional to 13,279.84, 20,008.40 and 12,014.88

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Solution

The fourth proportional to 13,279.84, 20,008.40 and 12,014.88 is: 18,102.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.84 : 20,008.40 = 12,014.88 : x
  2. Step 2: Convert to fraction form
    13,279.84/20,008.40 = 12,014.88/x
  3. Step 3: Cross multiply
    13,279.84x = 20,008.40 × 12,014.88
  4. Step 4: Simplify right side
    13,279.84x = 240,398,524.99
  5. Step 5: Solve for x
    x = 240,398,524.99/13,279.84
  6. Step 6: Final answer
    x = 18,102.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.