Home / 21,226.72-29,284.32-12,828.64

Finding the Fourth Proportional to 21,226.72, 29,284.32 and 12,828.64

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Solution

The fourth proportional to 21,226.72, 29,284.32 and 12,828.64 is: 17,698.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,226.72 : 29,284.32 = 12,828.64 : x
  2. Step 2: Convert to fraction form
    21,226.72/29,284.32 = 12,828.64/x
  3. Step 3: Cross multiply
    21,226.72x = 29,284.32 × 12,828.64
  4. Step 4: Simplify right side
    21,226.72x = 375,677,998.92
  5. Step 5: Solve for x
    x = 375,677,998.92/21,226.72
  6. Step 6: Final answer
    x = 17,698.35

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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.