Home / 20,145.67-30,070.62-18,661.24

Finding the Fourth Proportional to 20,145.67, 30,070.62 and 18,661.24

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Solution

The fourth proportional to 20,145.67, 30,070.62 and 18,661.24 is: 27,854.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.67 : 30,070.62 = 18,661.24 : x
  2. Step 2: Convert to fraction form
    20,145.67/30,070.62 = 18,661.24/x
  3. Step 3: Cross multiply
    20,145.67x = 30,070.62 × 18,661.24
  4. Step 4: Simplify right side
    20,145.67x = 561,155,056.77
  5. Step 5: Solve for x
    x = 561,155,056.77/20,145.67
  6. Step 6: Final answer
    x = 27,854.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.