Home / 21,090.55-29,103.81-11,658.50

Finding the Fourth Proportional to 21,090.55, 29,103.81 and 11,658.50

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Solution

The fourth proportional to 21,090.55, 29,103.81 and 11,658.50 is: 16,088.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.55 : 29,103.81 = 11,658.50 : x
  2. Step 2: Convert to fraction form
    21,090.55/29,103.81 = 11,658.50/x
  3. Step 3: Cross multiply
    21,090.55x = 29,103.81 × 11,658.50
  4. Step 4: Simplify right side
    21,090.55x = 339,306,768.89
  5. Step 5: Solve for x
    x = 339,306,768.89/21,090.55
  6. Step 6: Final answer
    x = 16,088.09

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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.