Home / 15,661.35-21,600.09-13,768.92

Finding the Fourth Proportional to 15,661.35, 21,600.09 and 13,768.92

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Solution

The fourth proportional to 15,661.35, 21,600.09 and 13,768.92 is: 18,990.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.35 : 21,600.09 = 13,768.92 : x
  2. Step 2: Convert to fraction form
    15,661.35/21,600.09 = 13,768.92/x
  3. Step 3: Cross multiply
    15,661.35x = 21,600.09 × 13,768.92
  4. Step 4: Simplify right side
    15,661.35x = 297,409,911.20
  5. Step 5: Solve for x
    x = 297,409,911.20/15,661.35
  6. Step 6: Final answer
    x = 18,990.06

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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.