Home / 21,271.26-29,357.64-12,778.11

Finding the Fourth Proportional to 21,271.26, 29,357.64 and 12,778.11

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Solution

The fourth proportional to 21,271.26, 29,357.64 and 12,778.11 is: 17,635.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.26 : 29,357.64 = 12,778.11 : x
  2. Step 2: Convert to fraction form
    21,271.26/29,357.64 = 12,778.11/x
  3. Step 3: Cross multiply
    21,271.26x = 29,357.64 × 12,778.11
  4. Step 4: Simplify right side
    21,271.26x = 375,135,153.26
  5. Step 5: Solve for x
    x = 375,135,153.26/21,271.26
  6. Step 6: Final answer
    x = 17,635.77

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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.