Home / 21,130.90-29,125.21-16,868.30

Finding the Fourth Proportional to 21,130.90, 29,125.21 and 16,868.30

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Solution

The fourth proportional to 21,130.90, 29,125.21 and 16,868.30 is: 23,249.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.90 : 29,125.21 = 16,868.30 : x
  2. Step 2: Convert to fraction form
    21,130.90/29,125.21 = 16,868.30/x
  3. Step 3: Cross multiply
    21,130.90x = 29,125.21 × 16,868.30
  4. Step 4: Simplify right side
    21,130.90x = 491,292,592.05
  5. Step 5: Solve for x
    x = 491,292,592.05/21,130.90
  6. Step 6: Final answer
    x = 23,249.96

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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.