Home / 21,845.06-30,136.71-13,772.35

Finding the Fourth Proportional to 21,845.06, 30,136.71 and 13,772.35

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Solution

The fourth proportional to 21,845.06, 30,136.71 and 13,772.35 is: 18,999.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.06 : 30,136.71 = 13,772.35 : x
  2. Step 2: Convert to fraction form
    21,845.06/30,136.71 = 13,772.35/x
  3. Step 3: Cross multiply
    21,845.06x = 30,136.71 × 13,772.35
  4. Step 4: Simplify right side
    21,845.06x = 415,053,242.63
  5. Step 5: Solve for x
    x = 415,053,242.63/21,845.06
  6. Step 6: Final answer
    x = 18,999.87

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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.