Home / 20,783.32-28,680.15-11,352.22

Finding the Fourth Proportional to 20,783.32, 28,680.15 and 11,352.22

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Solution

The fourth proportional to 20,783.32, 28,680.15 and 11,352.22 is: 15,665.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.32 : 28,680.15 = 11,352.22 : x
  2. Step 2: Convert to fraction form
    20,783.32/28,680.15 = 11,352.22/x
  3. Step 3: Cross multiply
    20,783.32x = 28,680.15 × 11,352.22
  4. Step 4: Simplify right side
    20,783.32x = 325,583,372.43
  5. Step 5: Solve for x
    x = 325,583,372.43/20,783.32
  6. Step 6: Final answer
    x = 15,665.61

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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.