Home / 20,980.77-31,475.76-9,136.44

Finding the Fourth Proportional to 20,980.77, 31,475.76 and 9,136.44

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Solution

The fourth proportional to 20,980.77, 31,475.76 and 9,136.44 is: 13,706.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.77 : 31,475.76 = 9,136.44 : x
  2. Step 2: Convert to fraction form
    20,980.77/31,475.76 = 9,136.44/x
  3. Step 3: Cross multiply
    20,980.77x = 31,475.76 × 9,136.44
  4. Step 4: Simplify right side
    20,980.77x = 287,576,392.69
  5. Step 5: Solve for x
    x = 287,576,392.69/20,980.77
  6. Step 6: Final answer
    x = 13,706.67

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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.