Home / 31,213.80-46,820.70-18,772.20

Finding the Fourth Proportional to 31,213.80, 46,820.70 and 18,772.20

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Solution

The fourth proportional to 31,213.80, 46,820.70 and 18,772.20 is: 28,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,213.80 : 46,820.70 = 18,772.20 : x
  2. Step 2: Convert to fraction form
    31,213.80/46,820.70 = 18,772.20/x
  3. Step 3: Cross multiply
    31,213.80x = 46,820.70 × 18,772.20
  4. Step 4: Simplify right side
    31,213.80x = 878,927,544.54
  5. Step 5: Solve for x
    x = 878,927,544.54/31,213.80
  6. Step 6: Final answer
    x = 28,158.30

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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.