Home / 20,572.86-28,390.44-11,620.32

Finding the Fourth Proportional to 20,572.86, 28,390.44 and 11,620.32

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Solution

The fourth proportional to 20,572.86, 28,390.44 and 11,620.32 is: 16,035.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.86 : 28,390.44 = 11,620.32 : x
  2. Step 2: Convert to fraction form
    20,572.86/28,390.44 = 11,620.32/x
  3. Step 3: Cross multiply
    20,572.86x = 28,390.44 × 11,620.32
  4. Step 4: Simplify right side
    20,572.86x = 329,905,997.74
  5. Step 5: Solve for x
    x = 329,905,997.74/20,572.86
  6. Step 6: Final answer
    x = 16,035.98

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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.