Home / 28,106.19-42,163.86-13,128.29

Finding the Fourth Proportional to 28,106.19, 42,163.86 and 13,128.29

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Solution

The fourth proportional to 28,106.19, 42,163.86 and 13,128.29 is: 19,694.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.19 : 42,163.86 = 13,128.29 : x
  2. Step 2: Convert to fraction form
    28,106.19/42,163.86 = 13,128.29/x
  3. Step 3: Cross multiply
    28,106.19x = 42,163.86 × 13,128.29
  4. Step 4: Simplify right side
    28,106.19x = 553,539,170.78
  5. Step 5: Solve for x
    x = 553,539,170.78/28,106.19
  6. Step 6: Final answer
    x = 19,694.56

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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.