Home / 21,147.28-29,181.26-12,647.68

Finding the Fourth Proportional to 21,147.28, 29,181.26 and 12,647.68

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Solution

The fourth proportional to 21,147.28, 29,181.26 and 12,647.68 is: 17,452.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.28 : 29,181.26 = 12,647.68 : x
  2. Step 2: Convert to fraction form
    21,147.28/29,181.26 = 12,647.68/x
  3. Step 3: Cross multiply
    21,147.28x = 29,181.26 × 12,647.68
  4. Step 4: Simplify right side
    21,147.28x = 369,075,197.14
  5. Step 5: Solve for x
    x = 369,075,197.14/21,147.28
  6. Step 6: Final answer
    x = 17,452.61

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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.