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Finding the Fourth Proportional to 13,245.76, 19,868.59 and 8,318.84

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Solution

The fourth proportional to 13,245.76, 19,868.59 and 8,318.84 is: 12,478.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.76 : 19,868.59 = 8,318.84 : x
  2. Step 2: Convert to fraction form
    13,245.76/19,868.59 = 8,318.84/x
  3. Step 3: Cross multiply
    13,245.76x = 19,868.59 × 8,318.84
  4. Step 4: Simplify right side
    13,245.76x = 165,283,532.29
  5. Step 5: Solve for x
    x = 165,283,532.29/13,245.76
  6. Step 6: Final answer
    x = 12,478.22

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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.