Home / 20,718.55-31,077.80-5,136.18

Finding the Fourth Proportional to 20,718.55, 31,077.80 and 5,136.18

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Solution

The fourth proportional to 20,718.55, 31,077.80 and 5,136.18 is: 7,704.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.55 : 31,077.80 = 5,136.18 : x
  2. Step 2: Convert to fraction form
    20,718.55/31,077.80 = 5,136.18/x
  3. Step 3: Cross multiply
    20,718.55x = 31,077.80 × 5,136.18
  4. Step 4: Simplify right side
    20,718.55x = 159,621,174.80
  5. Step 5: Solve for x
    x = 159,621,174.80/20,718.55
  6. Step 6: Final answer
    x = 7,704.26

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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.