Home / 20,572.91-28,391.16-12,619.52

Finding the Fourth Proportional to 20,572.91, 28,391.16 and 12,619.52

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Solution

The fourth proportional to 20,572.91, 28,391.16 and 12,619.52 is: 17,415.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.91 : 28,391.16 = 12,619.52 : x
  2. Step 2: Convert to fraction form
    20,572.91/28,391.16 = 12,619.52/x
  3. Step 3: Cross multiply
    20,572.91x = 28,391.16 × 12,619.52
  4. Step 4: Simplify right side
    20,572.91x = 358,282,606.39
  5. Step 5: Solve for x
    x = 358,282,606.39/20,572.91
  6. Step 6: Final answer
    x = 17,415.27

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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.