Home / 13,243.40-19,879.68-10,487.78

Finding the Fourth Proportional to 13,243.40, 19,879.68 and 10,487.78

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Solution

The fourth proportional to 13,243.40, 19,879.68 and 10,487.78 is: 15,743.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,243.40 : 19,879.68 = 10,487.78 : x
  2. Step 2: Convert to fraction form
    13,243.40/19,879.68 = 10,487.78/x
  3. Step 3: Cross multiply
    13,243.40x = 19,879.68 × 10,487.78
  4. Step 4: Simplify right side
    13,243.40x = 208,493,710.31
  5. Step 5: Solve for x
    x = 208,493,710.31/13,243.40
  6. Step 6: Final answer
    x = 15,743.22

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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.