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Finding the Fourth Proportional to 12,653.15, 18,964.33 and 8,956.45

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Solution

The fourth proportional to 12,653.15, 18,964.33 and 8,956.45 is: 13,423.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.15 : 18,964.33 = 8,956.45 : x
  2. Step 2: Convert to fraction form
    12,653.15/18,964.33 = 8,956.45/x
  3. Step 3: Cross multiply
    12,653.15x = 18,964.33 × 8,956.45
  4. Step 4: Simplify right side
    12,653.15x = 169,853,073.43
  5. Step 5: Solve for x
    x = 169,853,073.43/12,653.15
  6. Step 6: Final answer
    x = 13,423.78

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1.5x scale

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.