Home / 21,221.80-31,784.24-10,136.32

Finding the Fourth Proportional to 21,221.80, 31,784.24 and 10,136.32

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Solution

The fourth proportional to 21,221.80, 31,784.24 and 10,136.32 is: 15,181.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.80 : 31,784.24 = 10,136.32 : x
  2. Step 2: Convert to fraction form
    21,221.80/31,784.24 = 10,136.32/x
  3. Step 3: Cross multiply
    21,221.80x = 31,784.24 × 10,136.32
  4. Step 4: Simplify right side
    21,221.80x = 322,175,227.60
  5. Step 5: Solve for x
    x = 322,175,227.60/21,221.80
  6. Step 6: Final answer
    x = 15,181.33

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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.