Home / 20,345.84-28,076.01-11,391.83

Finding the Fourth Proportional to 20,345.84, 28,076.01 and 11,391.83

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Solution

The fourth proportional to 20,345.84, 28,076.01 and 11,391.83 is: 15,720.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.84 : 28,076.01 = 11,391.83 : x
  2. Step 2: Convert to fraction form
    20,345.84/28,076.01 = 11,391.83/x
  3. Step 3: Cross multiply
    20,345.84x = 28,076.01 × 11,391.83
  4. Step 4: Simplify right side
    20,345.84x = 319,837,133.00
  5. Step 5: Solve for x
    x = 319,837,133.00/20,345.84
  6. Step 6: Final answer
    x = 15,720.03

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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.