Home / 20,500.74-28,291.23-12,000.99

Finding the Fourth Proportional to 20,500.74, 28,291.23 and 12,000.99

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Solution

The fourth proportional to 20,500.74, 28,291.23 and 12,000.99 is: 16,561.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.74 : 28,291.23 = 12,000.99 : x
  2. Step 2: Convert to fraction form
    20,500.74/28,291.23 = 12,000.99/x
  3. Step 3: Cross multiply
    20,500.74x = 28,291.23 × 12,000.99
  4. Step 4: Simplify right side
    20,500.74x = 339,522,768.32
  5. Step 5: Solve for x
    x = 339,522,768.32/20,500.74
  6. Step 6: Final answer
    x = 16,561.49

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Similar ratio
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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.