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Finding the Fourth Proportional to 14,695.50, 20,279.80 and 8,071.50

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Solution

The fourth proportional to 14,695.50, 20,279.80 and 8,071.50 is: 11,138.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,695.50 : 20,279.80 = 8,071.50 : x
  2. Step 2: Convert to fraction form
    14,695.50/20,279.80 = 8,071.50/x
  3. Step 3: Cross multiply
    14,695.50x = 20,279.80 × 8,071.50
  4. Step 4: Simplify right side
    14,695.50x = 163,688,405.70
  5. Step 5: Solve for x
    x = 163,688,405.70/14,695.50
  6. Step 6: Final answer
    x = 11,138.68

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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.