Home / 31,611.56-47,433.90-20,515.64

Finding the Fourth Proportional to 31,611.56, 47,433.90 and 20,515.64

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Solution

The fourth proportional to 31,611.56, 47,433.90 and 20,515.64 is: 30,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,611.56 : 47,433.90 = 20,515.64 : x
  2. Step 2: Convert to fraction form
    31,611.56/47,433.90 = 20,515.64/x
  3. Step 3: Cross multiply
    31,611.56x = 47,433.90 × 20,515.64
  4. Step 4: Simplify right side
    31,611.56x = 973,136,816.20
  5. Step 5: Solve for x
    x = 973,136,816.20/31,611.56
  6. Step 6: Final answer
    x = 30,784.21

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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.