Home / 21,143.67-29,165.06-13,599.83

Finding the Fourth Proportional to 21,143.67, 29,165.06 and 13,599.83

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Solution

The fourth proportional to 21,143.67, 29,165.06 and 13,599.83 is: 18,759.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.67 : 29,165.06 = 13,599.83 : x
  2. Step 2: Convert to fraction form
    21,143.67/29,165.06 = 13,599.83/x
  3. Step 3: Cross multiply
    21,143.67x = 29,165.06 × 13,599.83
  4. Step 4: Simplify right side
    21,143.67x = 396,639,964.85
  5. Step 5: Solve for x
    x = 396,639,964.85/21,143.67
  6. Step 6: Final answer
    x = 18,759.28

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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.