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Finding the Fourth Proportional to 14,905.98, 20,568.92 and 8,191.53

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Solution

The fourth proportional to 14,905.98, 20,568.92 and 8,191.53 is: 11,303.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,905.98 : 20,568.92 = 8,191.53 : x
  2. Step 2: Convert to fraction form
    14,905.98/20,568.92 = 8,191.53/x
  3. Step 3: Cross multiply
    14,905.98x = 20,568.92 × 8,191.53
  4. Step 4: Simplify right side
    14,905.98x = 168,490,884.29
  5. Step 5: Solve for x
    x = 168,490,884.29/14,905.98
  6. Step 6: Final answer
    x = 11,303.58

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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.