Home / 21,316.62-29,399.70-20,455.48

Finding the Fourth Proportional to 21,316.62, 29,399.70 and 20,455.48

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Solution

The fourth proportional to 21,316.62, 29,399.70 and 20,455.48 is: 28,212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.62 : 29,399.70 = 20,455.48 : x
  2. Step 2: Convert to fraction form
    21,316.62/29,399.70 = 20,455.48/x
  3. Step 3: Cross multiply
    21,316.62x = 29,399.70 × 20,455.48
  4. Step 4: Simplify right side
    21,316.62x = 601,384,975.36
  5. Step 5: Solve for x
    x = 601,384,975.36/21,316.62
  6. Step 6: Final answer
    x = 28,212.02

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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.