Home / 21,489.21-29,651.81-12,055.95

Finding the Fourth Proportional to 21,489.21, 29,651.81 and 12,055.95

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Solution

The fourth proportional to 21,489.21, 29,651.81 and 12,055.95 is: 16,635.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.21 : 29,651.81 = 12,055.95 : x
  2. Step 2: Convert to fraction form
    21,489.21/29,651.81 = 12,055.95/x
  3. Step 3: Cross multiply
    21,489.21x = 29,651.81 × 12,055.95
  4. Step 4: Simplify right side
    21,489.21x = 357,480,678.49
  5. Step 5: Solve for x
    x = 357,480,678.49/21,489.21
  6. Step 6: Final answer
    x = 16,635.36

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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.