Home / 20,385.05-30,509.53-11,617.61

Finding the Fourth Proportional to 20,385.05, 30,509.53 and 11,617.61

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Solution

The fourth proportional to 20,385.05, 30,509.53 and 11,617.61 is: 17,387.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.05 : 30,509.53 = 11,617.61 : x
  2. Step 2: Convert to fraction form
    20,385.05/30,509.53 = 11,617.61/x
  3. Step 3: Cross multiply
    20,385.05x = 30,509.53 × 11,617.61
  4. Step 4: Simplify right side
    20,385.05x = 354,447,820.82
  5. Step 5: Solve for x
    x = 354,447,820.82/20,385.05
  6. Step 6: Final answer
    x = 17,387.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.