Home / 21,136.32-31,724.16-10,755.84

Finding the Fourth Proportional to 21,136.32, 31,724.16 and 10,755.84

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Solution

The fourth proportional to 21,136.32, 31,724.16 and 10,755.84 is: 16,143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.32 : 31,724.16 = 10,755.84 : x
  2. Step 2: Convert to fraction form
    21,136.32/31,724.16 = 10,755.84/x
  3. Step 3: Cross multiply
    21,136.32x = 31,724.16 × 10,755.84
  4. Step 4: Simplify right side
    21,136.32x = 341,219,989.09
  5. Step 5: Solve for x
    x = 341,219,989.09/21,136.32
  6. Step 6: Final answer
    x = 16,143.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.