Home / 20,721.08-28,594.68-11,289.71

Finding the Fourth Proportional to 20,721.08, 28,594.68 and 11,289.71

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Solution

The fourth proportional to 20,721.08, 28,594.68 and 11,289.71 is: 15,579.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.08 : 28,594.68 = 11,289.71 : x
  2. Step 2: Convert to fraction form
    20,721.08/28,594.68 = 11,289.71/x
  3. Step 3: Cross multiply
    20,721.08x = 28,594.68 × 11,289.71
  4. Step 4: Simplify right side
    20,721.08x = 322,825,644.74
  5. Step 5: Solve for x
    x = 322,825,644.74/20,721.08
  6. Step 6: Final answer
    x = 15,579.58

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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.