Home / 21,209.95-29,270.63-11,778.50

Finding the Fourth Proportional to 21,209.95, 29,270.63 and 11,778.50

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Solution

The fourth proportional to 21,209.95, 29,270.63 and 11,778.50 is: 16,254.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.95 : 29,270.63 = 11,778.50 : x
  2. Step 2: Convert to fraction form
    21,209.95/29,270.63 = 11,778.50/x
  3. Step 3: Cross multiply
    21,209.95x = 29,270.63 × 11,778.50
  4. Step 4: Simplify right side
    21,209.95x = 344,764,115.46
  5. Step 5: Solve for x
    x = 344,764,115.46/21,209.95
  6. Step 6: Final answer
    x = 16,254.83

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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.