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Finding the Fourth Proportional to 14,949.79, 20,630.88 and 8,235.28

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Solution

The fourth proportional to 14,949.79, 20,630.88 and 8,235.28 is: 11,364.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,949.79 : 20,630.88 = 8,235.28 : x
  2. Step 2: Convert to fraction form
    14,949.79/20,630.88 = 8,235.28/x
  3. Step 3: Cross multiply
    14,949.79x = 20,630.88 × 8,235.28
  4. Step 4: Simplify right side
    14,949.79x = 169,901,073.45
  5. Step 5: Solve for x
    x = 169,901,073.45/14,949.79
  6. Step 6: Final answer
    x = 11,364.78

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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.