Home / 20,997.45-28,975.93-11,437.16

Finding the Fourth Proportional to 20,997.45, 28,975.93 and 11,437.16

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Solution

The fourth proportional to 20,997.45, 28,975.93 and 11,437.16 is: 15,782.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.45 : 28,975.93 = 11,437.16 : x
  2. Step 2: Convert to fraction form
    20,997.45/28,975.93 = 11,437.16/x
  3. Step 3: Cross multiply
    20,997.45x = 28,975.93 × 11,437.16
  4. Step 4: Simplify right side
    20,997.45x = 331,402,174.09
  5. Step 5: Solve for x
    x = 331,402,174.09/20,997.45
  6. Step 6: Final answer
    x = 15,782.97

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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.