Home / 21,797.89-30,082.08-12,845.77

Finding the Fourth Proportional to 21,797.89, 30,082.08 and 12,845.77

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Solution

The fourth proportional to 21,797.89, 30,082.08 and 12,845.77 is: 17,727.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,797.89 : 30,082.08 = 12,845.77 : x
  2. Step 2: Convert to fraction form
    21,797.89/30,082.08 = 12,845.77/x
  3. Step 3: Cross multiply
    21,797.89x = 30,082.08 × 12,845.77
  4. Step 4: Simplify right side
    21,797.89x = 386,427,556.01
  5. Step 5: Solve for x
    x = 386,427,556.01/21,797.89
  6. Step 6: Final answer
    x = 17,727.75

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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.