Home / 19,561.39-29,338.15-12,520.12

Finding the Fourth Proportional to 19,561.39, 29,338.15 and 12,520.12

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Solution

The fourth proportional to 19,561.39, 29,338.15 and 12,520.12 is: 18,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,561.39 : 29,338.15 = 12,520.12 : x
  2. Step 2: Convert to fraction form
    19,561.39/29,338.15 = 12,520.12/x
  3. Step 3: Cross multiply
    19,561.39x = 29,338.15 × 12,520.12
  4. Step 4: Simplify right side
    19,561.39x = 367,317,132.42
  5. Step 5: Solve for x
    x = 367,317,132.42/19,561.39
  6. Step 6: Final answer
    x = 18,777.66

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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.