Home / 21,156.93-31,704.19-11,784.04

Finding the Fourth Proportional to 21,156.93, 31,704.19 and 11,784.04

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Solution

The fourth proportional to 21,156.93, 31,704.19 and 11,784.04 is: 17,658.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.93 : 31,704.19 = 11,784.04 : x
  2. Step 2: Convert to fraction form
    21,156.93/31,704.19 = 11,784.04/x
  3. Step 3: Cross multiply
    21,156.93x = 31,704.19 × 11,784.04
  4. Step 4: Simplify right side
    21,156.93x = 373,603,443.13
  5. Step 5: Solve for x
    x = 373,603,443.13/21,156.93
  6. Step 6: Final answer
    x = 17,658.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.