Home / 15,820.60-21,832.32-9,107.86

Finding the Fourth Proportional to 15,820.60, 21,832.32 and 9,107.86

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Solution

The fourth proportional to 15,820.60, 21,832.32 and 9,107.86 is: 12,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.60 : 21,832.32 = 9,107.86 : x
  2. Step 2: Convert to fraction form
    15,820.60/21,832.32 = 9,107.86/x
  3. Step 3: Cross multiply
    15,820.60x = 21,832.32 × 9,107.86
  4. Step 4: Simplify right side
    15,820.60x = 198,845,714.04
  5. Step 5: Solve for x
    x = 198,845,714.04/15,820.60
  6. Step 6: Final answer
    x = 12,568.78

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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.