Home / 21,211.29-31,816.91-5,416.33

Finding the Fourth Proportional to 21,211.29, 31,816.91 and 5,416.33

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Solution

The fourth proportional to 21,211.29, 31,816.91 and 5,416.33 is: 8,124.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.29 : 31,816.91 = 5,416.33 : x
  2. Step 2: Convert to fraction form
    21,211.29/31,816.91 = 5,416.33/x
  3. Step 3: Cross multiply
    21,211.29x = 31,816.91 × 5,416.33
  4. Step 4: Simplify right side
    21,211.29x = 172,330,818.14
  5. Step 5: Solve for x
    x = 172,330,818.14/21,211.29
  6. Step 6: Final answer
    x = 8,124.49

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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.