Home / 21,018.28-29,004.42-11,586.64

Finding the Fourth Proportional to 21,018.28, 29,004.42 and 11,586.64

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Solution

The fourth proportional to 21,018.28, 29,004.42 and 11,586.64 is: 15,989.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.28 : 29,004.42 = 11,586.64 : x
  2. Step 2: Convert to fraction form
    21,018.28/29,004.42 = 11,586.64/x
  3. Step 3: Cross multiply
    21,018.28x = 29,004.42 × 11,586.64
  4. Step 4: Simplify right side
    21,018.28x = 336,063,772.95
  5. Step 5: Solve for x
    x = 336,063,772.95/21,018.28
  6. Step 6: Final answer
    x = 15,989.12

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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.