Home / 21,235.91-31,718.06-19,231.61

Finding the Fourth Proportional to 21,235.91, 31,718.06 and 19,231.61

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Solution

The fourth proportional to 21,235.91, 31,718.06 and 19,231.61 is: 28,724.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.91 : 31,718.06 = 19,231.61 : x
  2. Step 2: Convert to fraction form
    21,235.91/31,718.06 = 19,231.61/x
  3. Step 3: Cross multiply
    21,235.91x = 31,718.06 × 19,231.61
  4. Step 4: Simplify right side
    21,235.91x = 609,989,487.25
  5. Step 5: Solve for x
    x = 609,989,487.25/21,235.91
  6. Step 6: Final answer
    x = 28,724.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.