Home / 21,221.94-31,784.43-10,136.47

Finding the Fourth Proportional to 21,221.94, 31,784.43 and 10,136.47

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Solution

The fourth proportional to 21,221.94, 31,784.43 and 10,136.47 is: 15,181.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.94 : 31,784.43 = 10,136.47 : x
  2. Step 2: Convert to fraction form
    21,221.94/31,784.43 = 10,136.47/x
  3. Step 3: Cross multiply
    21,221.94x = 31,784.43 × 10,136.47
  4. Step 4: Simplify right side
    21,221.94x = 322,181,762.24
  5. Step 5: Solve for x
    x = 322,181,762.24/21,221.94
  6. Step 6: Final answer
    x = 15,181.55

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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.