Home / 20,586.90-30,880.34-7,438.98

Finding the Fourth Proportional to 20,586.90, 30,880.34 and 7,438.98

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Solution

The fourth proportional to 20,586.90, 30,880.34 and 7,438.98 is: 11,158.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.90 : 30,880.34 = 7,438.98 : x
  2. Step 2: Convert to fraction form
    20,586.90/30,880.34 = 7,438.98/x
  3. Step 3: Cross multiply
    20,586.90x = 30,880.34 × 7,438.98
  4. Step 4: Simplify right side
    20,586.90x = 229,718,231.65
  5. Step 5: Solve for x
    x = 229,718,231.65/20,586.90
  6. Step 6: Final answer
    x = 11,158.47

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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.