Home / 20,455.04-30,740.34-12,136.62

Finding the Fourth Proportional to 20,455.04, 30,740.34 and 12,136.62

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Solution

The fourth proportional to 20,455.04, 30,740.34 and 12,136.62 is: 18,239.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.04 : 30,740.34 = 12,136.62 : x
  2. Step 2: Convert to fraction form
    20,455.04/30,740.34 = 12,136.62/x
  3. Step 3: Cross multiply
    20,455.04x = 30,740.34 × 12,136.62
  4. Step 4: Simplify right side
    20,455.04x = 373,083,825.25
  5. Step 5: Solve for x
    x = 373,083,825.25/20,455.04
  6. Step 6: Final answer
    x = 18,239.21

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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.