Home / 20,145.75-30,215.39-14,284.59

Finding the Fourth Proportional to 20,145.75, 30,215.39 and 14,284.59

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Solution

The fourth proportional to 20,145.75, 30,215.39 and 14,284.59 is: 21,424.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.75 : 30,215.39 = 14,284.59 : x
  2. Step 2: Convert to fraction form
    20,145.75/30,215.39 = 14,284.59/x
  3. Step 3: Cross multiply
    20,145.75x = 30,215.39 × 14,284.59
  4. Step 4: Simplify right side
    20,145.75x = 431,614,386.42
  5. Step 5: Solve for x
    x = 431,614,386.42/20,145.75
  6. Step 6: Final answer
    x = 21,424.59

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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.