Home / 21,088.86-31,643.42-12,324.47

Finding the Fourth Proportional to 21,088.86, 31,643.42 and 12,324.47

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Solution

The fourth proportional to 21,088.86, 31,643.42 and 12,324.47 is: 18,492.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.86 : 31,643.42 = 12,324.47 : x
  2. Step 2: Convert to fraction form
    21,088.86/31,643.42 = 12,324.47/x
  3. Step 3: Cross multiply
    21,088.86x = 31,643.42 × 12,324.47
  4. Step 4: Simplify right side
    21,088.86x = 389,988,160.65
  5. Step 5: Solve for x
    x = 389,988,160.65/21,088.86
  6. Step 6: Final answer
    x = 18,492.61

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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.