Home / 20,435.12-28,199.88-11,360.24

Finding the Fourth Proportional to 20,435.12, 28,199.88 and 11,360.24

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Solution

The fourth proportional to 20,435.12, 28,199.88 and 11,360.24 is: 15,676.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.12 : 28,199.88 = 11,360.24 : x
  2. Step 2: Convert to fraction form
    20,435.12/28,199.88 = 11,360.24/x
  3. Step 3: Cross multiply
    20,435.12x = 28,199.88 × 11,360.24
  4. Step 4: Simplify right side
    20,435.12x = 320,357,404.77
  5. Step 5: Solve for x
    x = 320,357,404.77/20,435.12
  6. Step 6: Final answer
    x = 15,676.81

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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.