Home / 28,105.69-42,163.11-13,127.79

Finding the Fourth Proportional to 28,105.69, 42,163.11 and 13,127.79

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Solution

The fourth proportional to 28,105.69, 42,163.11 and 13,127.79 is: 19,693.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.69 : 42,163.11 = 13,127.79 : x
  2. Step 2: Convert to fraction form
    28,105.69/42,163.11 = 13,127.79/x
  3. Step 3: Cross multiply
    28,105.69x = 42,163.11 × 13,127.79
  4. Step 4: Simplify right side
    28,105.69x = 553,508,453.83
  5. Step 5: Solve for x
    x = 553,508,453.83/28,105.69
  6. Step 6: Final answer
    x = 19,693.82

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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.