Home / 21,140.38-29,174.34-12,190.69

Finding the Fourth Proportional to 21,140.38, 29,174.34 and 12,190.69

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Solution

The fourth proportional to 21,140.38, 29,174.34 and 12,190.69 is: 16,823.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.38 : 29,174.34 = 12,190.69 : x
  2. Step 2: Convert to fraction form
    21,140.38/29,174.34 = 12,190.69/x
  3. Step 3: Cross multiply
    21,140.38x = 29,174.34 × 12,190.69
  4. Step 4: Simplify right side
    21,140.38x = 355,655,334.89
  5. Step 5: Solve for x
    x = 355,655,334.89/21,140.38
  6. Step 6: Final answer
    x = 16,823.51

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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.