Home / 31,467.78-43,403.42-20,709.23

Finding the Fourth Proportional to 31,467.78, 43,403.42 and 20,709.23

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Solution

The fourth proportional to 31,467.78, 43,403.42 and 20,709.23 is: 28,564.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,467.78 : 43,403.42 = 20,709.23 : x
  2. Step 2: Convert to fraction form
    31,467.78/43,403.42 = 20,709.23/x
  3. Step 3: Cross multiply
    31,467.78x = 43,403.42 × 20,709.23
  4. Step 4: Simplify right side
    31,467.78x = 898,851,242.32
  5. Step 5: Solve for x
    x = 898,851,242.32/31,467.78
  6. Step 6: Final answer
    x = 28,564.18

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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.