Home / 21,108.48-29,129.90-11,548.18

Finding the Fourth Proportional to 21,108.48, 29,129.90 and 11,548.18

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Solution

The fourth proportional to 21,108.48, 29,129.90 and 11,548.18 is: 15,936.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.48 : 29,129.90 = 11,548.18 : x
  2. Step 2: Convert to fraction form
    21,108.48/29,129.90 = 11,548.18/x
  3. Step 3: Cross multiply
    21,108.48x = 29,129.90 × 11,548.18
  4. Step 4: Simplify right side
    21,108.48x = 336,397,328.58
  5. Step 5: Solve for x
    x = 336,397,328.58/21,108.48
  6. Step 6: Final answer
    x = 15,936.60

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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.