Home / 20,631.64-28,471.74-11,200.21

Finding the Fourth Proportional to 20,631.64, 28,471.74 and 11,200.21

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Solution

The fourth proportional to 20,631.64, 28,471.74 and 11,200.21 is: 15,456.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.64 : 28,471.74 = 11,200.21 : x
  2. Step 2: Convert to fraction form
    20,631.64/28,471.74 = 11,200.21/x
  3. Step 3: Cross multiply
    20,631.64x = 28,471.74 × 11,200.21
  4. Step 4: Simplify right side
    20,631.64x = 318,889,467.07
  5. Step 5: Solve for x
    x = 318,889,467.07/20,631.64
  6. Step 6: Final answer
    x = 15,456.33

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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.