Home / 21,618.14-29,840.47-12,668.54

Finding the Fourth Proportional to 21,618.14, 29,840.47 and 12,668.54

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Solution

The fourth proportional to 21,618.14, 29,840.47 and 12,668.54 is: 17,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.14 : 29,840.47 = 12,668.54 : x
  2. Step 2: Convert to fraction form
    21,618.14/29,840.47 = 12,668.54/x
  3. Step 3: Cross multiply
    21,618.14x = 29,840.47 × 12,668.54
  4. Step 4: Simplify right side
    21,618.14x = 378,035,006.94
  5. Step 5: Solve for x
    x = 378,035,006.94/21,618.14
  6. Step 6: Final answer
    x = 17,486.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.