Home / 21,211.48-31,818.32-5,416.66

Finding the Fourth Proportional to 21,211.48, 31,818.32 and 5,416.66

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Solution

The fourth proportional to 21,211.48, 31,818.32 and 5,416.66 is: 8,125.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.48 : 31,818.32 = 5,416.66 : x
  2. Step 2: Convert to fraction form
    21,211.48/31,818.32 = 5,416.66/x
  3. Step 3: Cross multiply
    21,211.48x = 31,818.32 × 5,416.66
  4. Step 4: Simplify right side
    21,211.48x = 172,349,021.21
  5. Step 5: Solve for x
    x = 172,349,021.21/21,211.48
  6. Step 6: Final answer
    x = 8,125.27

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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.