Home / 21,655.72-29,884.90-12,226.28

Finding the Fourth Proportional to 21,655.72, 29,884.90 and 12,226.28

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Solution

The fourth proportional to 21,655.72, 29,884.90 and 12,226.28 is: 16,872.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.72 : 29,884.90 = 12,226.28 : x
  2. Step 2: Convert to fraction form
    21,655.72/29,884.90 = 12,226.28/x
  3. Step 3: Cross multiply
    21,655.72x = 29,884.90 × 12,226.28
  4. Step 4: Simplify right side
    21,655.72x = 365,381,155.17
  5. Step 5: Solve for x
    x = 365,381,155.17/21,655.72
  6. Step 6: Final answer
    x = 16,872.27

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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.