Home / 15,855.48-21,879.28-9,136.60

Finding the Fourth Proportional to 15,855.48, 21,879.28 and 9,136.60

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Solution

The fourth proportional to 15,855.48, 21,879.28 and 9,136.60 is: 12,607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.48 : 21,879.28 = 9,136.60 : x
  2. Step 2: Convert to fraction form
    15,855.48/21,879.28 = 9,136.60/x
  3. Step 3: Cross multiply
    15,855.48x = 21,879.28 × 9,136.60
  4. Step 4: Simplify right side
    15,855.48x = 199,902,074.57
  5. Step 5: Solve for x
    x = 199,902,074.57/15,855.48
  6. Step 6: Final answer
    x = 12,607.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.