Home / 21,171.48-29,220.44-12,217.74

Finding the Fourth Proportional to 21,171.48, 29,220.44 and 12,217.74

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Solution

The fourth proportional to 21,171.48, 29,220.44 and 12,217.74 is: 16,862.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.48 : 29,220.44 = 12,217.74 : x
  2. Step 2: Convert to fraction form
    21,171.48/29,220.44 = 12,217.74/x
  3. Step 3: Cross multiply
    21,171.48x = 29,220.44 × 12,217.74
  4. Step 4: Simplify right side
    21,171.48x = 357,007,738.61
  5. Step 5: Solve for x
    x = 357,007,738.61/21,171.48
  6. Step 6: Final answer
    x = 16,862.67

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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.