Home / 21,109.78-31,668.75-6,317.42

Finding the Fourth Proportional to 21,109.78, 31,668.75 and 6,317.42

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Solution

The fourth proportional to 21,109.78, 31,668.75 and 6,317.42 is: 9,477.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.78 : 31,668.75 = 6,317.42 : x
  2. Step 2: Convert to fraction form
    21,109.78/31,668.75 = 6,317.42/x
  3. Step 3: Cross multiply
    21,109.78x = 31,668.75 × 6,317.42
  4. Step 4: Simplify right side
    21,109.78x = 200,064,794.63
  5. Step 5: Solve for x
    x = 200,064,794.63/21,109.78
  6. Step 6: Final answer
    x = 9,477.35

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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.