Home / 20,620.99-30,891.69-12,307.66

Finding the Fourth Proportional to 20,620.99, 30,891.69 and 12,307.66

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Solution

The fourth proportional to 20,620.99, 30,891.69 and 12,307.66 is: 18,437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.99 : 30,891.69 = 12,307.66 : x
  2. Step 2: Convert to fraction form
    20,620.99/30,891.69 = 12,307.66/x
  3. Step 3: Cross multiply
    20,620.99x = 30,891.69 × 12,307.66
  4. Step 4: Simplify right side
    20,620.99x = 380,204,417.35
  5. Step 5: Solve for x
    x = 380,204,417.35/20,620.99
  6. Step 6: Final answer
    x = 18,437.74

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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.