Home / 21,127.72-29,162.07-12,635.68

Finding the Fourth Proportional to 21,127.72, 29,162.07 and 12,635.68

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Solution

The fourth proportional to 21,127.72, 29,162.07 and 12,635.68 is: 17,440.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.72 : 29,162.07 = 12,635.68 : x
  2. Step 2: Convert to fraction form
    21,127.72/29,162.07 = 12,635.68/x
  3. Step 3: Cross multiply
    21,127.72x = 29,162.07 × 12,635.68
  4. Step 4: Simplify right side
    21,127.72x = 368,482,584.66
  5. Step 5: Solve for x
    x = 368,482,584.66/21,127.72
  6. Step 6: Final answer
    x = 17,440.72

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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.