Home / 21,387.44-29,515.32-11,956.40

Finding the Fourth Proportional to 21,387.44, 29,515.32 and 11,956.40

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Solution

The fourth proportional to 21,387.44, 29,515.32 and 11,956.40 is: 16,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.44 : 29,515.32 = 11,956.40 : x
  2. Step 2: Convert to fraction form
    21,387.44/29,515.32 = 11,956.40/x
  3. Step 3: Cross multiply
    21,387.44x = 29,515.32 × 11,956.40
  4. Step 4: Simplify right side
    21,387.44x = 352,896,972.05
  5. Step 5: Solve for x
    x = 352,896,972.05/21,387.44
  6. Step 6: Final answer
    x = 16,500.20

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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.