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Finding the Fourth Proportional to 14,653.98, 20,222.49 and 7,939.65

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Solution

The fourth proportional to 14,653.98, 20,222.49 and 7,939.65 is: 10,956.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.98 : 20,222.49 = 7,939.65 : x
  2. Step 2: Convert to fraction form
    14,653.98/20,222.49 = 7,939.65/x
  3. Step 3: Cross multiply
    14,653.98x = 20,222.49 × 7,939.65
  4. Step 4: Simplify right side
    14,653.98x = 160,559,492.73
  5. Step 5: Solve for x
    x = 160,559,492.73/14,653.98
  6. Step 6: Final answer
    x = 10,956.72

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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.