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Finding the Fourth Proportional to 14,651.71, 20,220.59 and 8,279.46

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Solution

The fourth proportional to 14,651.71, 20,220.59 and 8,279.46 is: 11,426.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,651.71 : 20,220.59 = 8,279.46 : x
  2. Step 2: Convert to fraction form
    14,651.71/20,220.59 = 8,279.46/x
  3. Step 3: Cross multiply
    14,651.71x = 20,220.59 × 8,279.46
  4. Step 4: Simplify right side
    14,651.71x = 167,415,586.78
  5. Step 5: Solve for x
    x = 167,415,586.78/14,651.71
  6. Step 6: Final answer
    x = 11,426.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.