Home / 13,040.26-17,970.73-12,800.36

Finding the Fourth Proportional to 13,040.26, 17,970.73 and 12,800.36

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Solution

The fourth proportional to 13,040.26, 17,970.73 and 12,800.36 is: 17,640.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,040.26 : 17,970.73 = 12,800.36 : x
  2. Step 2: Convert to fraction form
    13,040.26/17,970.73 = 12,800.36/x
  3. Step 3: Cross multiply
    13,040.26x = 17,970.73 × 12,800.36
  4. Step 4: Simplify right side
    13,040.26x = 230,031,826.39
  5. Step 5: Solve for x
    x = 230,031,826.39/13,040.26
  6. Step 6: Final answer
    x = 17,640.13

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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.