Home / 21,111.93-31,668.03-5,316.93

Finding the Fourth Proportional to 21,111.93, 31,668.03 and 5,316.93

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Solution

The fourth proportional to 21,111.93, 31,668.03 and 5,316.93 is: 7,975.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.93 : 31,668.03 = 5,316.93 : x
  2. Step 2: Convert to fraction form
    21,111.93/31,668.03 = 5,316.93/x
  3. Step 3: Cross multiply
    21,111.93x = 31,668.03 × 5,316.93
  4. Step 4: Simplify right side
    21,111.93x = 168,376,698.75
  5. Step 5: Solve for x
    x = 168,376,698.75/21,111.93
  6. Step 6: Final answer
    x = 7,975.43

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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.