Home / 21,579.67-29,782.38-19,170.60

Finding the Fourth Proportional to 21,579.67, 29,782.38 and 19,170.60

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Solution

The fourth proportional to 21,579.67, 29,782.38 and 19,170.60 is: 26,457.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.67 : 29,782.38 = 19,170.60 : x
  2. Step 2: Convert to fraction form
    21,579.67/29,782.38 = 19,170.60/x
  3. Step 3: Cross multiply
    21,579.67x = 29,782.38 × 19,170.60
  4. Step 4: Simplify right side
    21,579.67x = 570,946,094.03
  5. Step 5: Solve for x
    x = 570,946,094.03/21,579.67
  6. Step 6: Final answer
    x = 26,457.59

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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.