Home / 21,135.30-29,165.54-11,703.25

Finding the Fourth Proportional to 21,135.30, 29,165.54 and 11,703.25

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Solution

The fourth proportional to 21,135.30, 29,165.54 and 11,703.25 is: 16,149.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.30 : 29,165.54 = 11,703.25 : x
  2. Step 2: Convert to fraction form
    21,135.30/29,165.54 = 11,703.25/x
  3. Step 3: Cross multiply
    21,135.30x = 29,165.54 × 11,703.25
  4. Step 4: Simplify right side
    21,135.30x = 341,331,606.01
  5. Step 5: Solve for x
    x = 341,331,606.01/21,135.30
  6. Step 6: Final answer
    x = 16,149.84

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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.