Home / 21,243-29,315.34-11,811.36

Finding the Fourth Proportional to 21,243, 29,315.34 and 11,811.36

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Solution

The fourth proportional to 21,243, 29,315.34 and 11,811.36 is: 16,299.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243 : 29,315.34 = 11,811.36 : x
  2. Step 2: Convert to fraction form
    21,243/29,315.34 = 11,811.36/x
  3. Step 3: Cross multiply
    21,243x = 29,315.34 × 11,811.36
  4. Step 4: Simplify right side
    21,243x = 346,254,034.26
  5. Step 5: Solve for x
    x = 346,254,034.26/21,243
  6. Step 6: Final answer
    x = 16,299.68

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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.