Home / 31,880.44-47,776.90-20,172.70

Finding the Fourth Proportional to 31,880.44, 47,776.90 and 20,172.70

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Solution

The fourth proportional to 31,880.44, 47,776.90 and 20,172.70 is: 30,231.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,880.44 : 47,776.90 = 20,172.70 : x
  2. Step 2: Convert to fraction form
    31,880.44/47,776.90 = 20,172.70/x
  3. Step 3: Cross multiply
    31,880.44x = 47,776.90 × 20,172.70
  4. Step 4: Simplify right side
    31,880.44x = 963,789,070.63
  5. Step 5: Solve for x
    x = 963,789,070.63/31,880.44
  6. Step 6: Final answer
    x = 30,231.36

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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.