Home / 20,572.79-28,390.47-11,620.31

Finding the Fourth Proportional to 20,572.79, 28,390.47 and 11,620.31

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Solution

The fourth proportional to 20,572.79, 28,390.47 and 11,620.31 is: 16,036.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.79 : 28,390.47 = 11,620.31 : x
  2. Step 2: Convert to fraction form
    20,572.79/28,390.47 = 11,620.31/x
  3. Step 3: Cross multiply
    20,572.79x = 28,390.47 × 11,620.31
  4. Step 4: Simplify right side
    20,572.79x = 329,906,062.45
  5. Step 5: Solve for x
    x = 329,906,062.45/20,572.79
  6. Step 6: Final answer
    x = 16,036.04

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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.