Home / 31,181.86-46,772.38-21,161.76

Finding the Fourth Proportional to 31,181.86, 46,772.38 and 21,161.76

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Solution

The fourth proportional to 31,181.86, 46,772.38 and 21,161.76 is: 31,742.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,181.86 : 46,772.38 = 21,161.76 : x
  2. Step 2: Convert to fraction form
    31,181.86/46,772.38 = 21,161.76/x
  3. Step 3: Cross multiply
    31,181.86x = 46,772.38 × 21,161.76
  4. Step 4: Simplify right side
    31,181.86x = 989,785,880.19
  5. Step 5: Solve for x
    x = 989,785,880.19/31,181.86
  6. Step 6: Final answer
    x = 31,742.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.