Home / 31,547.21-43,512.82-20,219.92

Finding the Fourth Proportional to 31,547.21, 43,512.82 and 20,219.92

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Solution

The fourth proportional to 31,547.21, 43,512.82 and 20,219.92 is: 27,889.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,547.21 : 43,512.82 = 20,219.92 : x
  2. Step 2: Convert to fraction form
    31,547.21/43,512.82 = 20,219.92/x
  3. Step 3: Cross multiply
    31,547.21x = 43,512.82 × 20,219.92
  4. Step 4: Simplify right side
    31,547.21x = 879,825,739.37
  5. Step 5: Solve for x
    x = 879,825,739.37/31,547.21
  6. Step 6: Final answer
    x = 27,889.18

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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.