Home / 21,126.98-29,090.12-18,765.02

Finding the Fourth Proportional to 21,126.98, 29,090.12 and 18,765.02

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Solution

The fourth proportional to 21,126.98, 29,090.12 and 18,765.02 is: 25,837.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.98 : 29,090.12 = 18,765.02 : x
  2. Step 2: Convert to fraction form
    21,126.98/29,090.12 = 18,765.02/x
  3. Step 3: Cross multiply
    21,126.98x = 29,090.12 × 18,765.02
  4. Step 4: Simplify right side
    21,126.98x = 545,876,683.60
  5. Step 5: Solve for x
    x = 545,876,683.60/21,126.98
  6. Step 6: Final answer
    x = 25,837.89

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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.