Home / 20,533.88-28,334.31-11,580.86

Finding the Fourth Proportional to 20,533.88, 28,334.31 and 11,580.86

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Solution

The fourth proportional to 20,533.88, 28,334.31 and 11,580.86 is: 15,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,533.88 : 28,334.31 = 11,580.86 : x
  2. Step 2: Convert to fraction form
    20,533.88/28,334.31 = 11,580.86/x
  3. Step 3: Cross multiply
    20,533.88x = 28,334.31 × 11,580.86
  4. Step 4: Simplify right side
    20,533.88x = 328,135,535.64
  5. Step 5: Solve for x
    x = 328,135,535.64/20,533.88
  6. Step 6: Final answer
    x = 15,980.21

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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.