Home / 21,083.10-29,082.87-12,582.78

Finding the Fourth Proportional to 21,083.10, 29,082.87 and 12,582.78

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Solution

The fourth proportional to 21,083.10, 29,082.87 and 12,582.78 is: 17,357.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.10 : 29,082.87 = 12,582.78 : x
  2. Step 2: Convert to fraction form
    21,083.10/29,082.87 = 12,582.78/x
  3. Step 3: Cross multiply
    21,083.10x = 29,082.87 × 12,582.78
  4. Step 4: Simplify right side
    21,083.10x = 365,943,354.98
  5. Step 5: Solve for x
    x = 365,943,354.98/21,083.10
  6. Step 6: Final answer
    x = 17,357.19

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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.