Home / 30,136.80-45,155.34-21,356.04

Finding the Fourth Proportional to 30,136.80, 45,155.34 and 21,356.04

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Solution

The fourth proportional to 30,136.80, 45,155.34 and 21,356.04 is: 31,998.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,136.80 : 45,155.34 = 21,356.04 : x
  2. Step 2: Convert to fraction form
    30,136.80/45,155.34 = 21,356.04/x
  3. Step 3: Cross multiply
    30,136.80x = 45,155.34 × 21,356.04
  4. Step 4: Simplify right side
    30,136.80x = 964,339,247.25
  5. Step 5: Solve for x
    x = 964,339,247.25/30,136.80
  6. Step 6: Final answer
    x = 31,998.73

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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.