Home / 19,745.61-27,220.10-15,021.69

Finding the Fourth Proportional to 19,745.61, 27,220.10 and 15,021.69

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Solution

The fourth proportional to 19,745.61, 27,220.10 and 15,021.69 is: 20,707.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,745.61 : 27,220.10 = 15,021.69 : x
  2. Step 2: Convert to fraction form
    19,745.61/27,220.10 = 15,021.69/x
  3. Step 3: Cross multiply
    19,745.61x = 27,220.10 × 15,021.69
  4. Step 4: Simplify right side
    19,745.61x = 408,891,828.86
  5. Step 5: Solve for x
    x = 408,891,828.86/19,745.61
  6. Step 6: Final answer
    x = 20,707.99

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Double scale
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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.