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Finding the Fourth Proportional to 13,090.70, 19,639.70 and 7,251.41

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Solution

The fourth proportional to 13,090.70, 19,639.70 and 7,251.41 is: 10,879.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.70 : 19,639.70 = 7,251.41 : x
  2. Step 2: Convert to fraction form
    13,090.70/19,639.70 = 7,251.41/x
  3. Step 3: Cross multiply
    13,090.70x = 19,639.70 × 7,251.41
  4. Step 4: Simplify right side
    13,090.70x = 142,415,382.52
  5. Step 5: Solve for x
    x = 142,415,382.52/13,090.70
  6. Step 6: Final answer
    x = 10,879.13

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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.