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Finding the Fourth Proportional to 13,140.70, 19,716.45 and 4,824.70

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Solution

The fourth proportional to 13,140.70, 19,716.45 and 4,824.70 is: 7,239.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.70 : 19,716.45 = 4,824.70 : x
  2. Step 2: Convert to fraction form
    13,140.70/19,716.45 = 4,824.70/x
  3. Step 3: Cross multiply
    13,140.70x = 19,716.45 × 4,824.70
  4. Step 4: Simplify right side
    13,140.70x = 95,125,956.32
  5. Step 5: Solve for x
    x = 95,125,956.32/13,140.70
  6. Step 6: Final answer
    x = 7,239.03

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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.