Home / 21,389.24-29,515.95-11,828.57

Finding the Fourth Proportional to 21,389.24, 29,515.95 and 11,828.57

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Solution

The fourth proportional to 21,389.24, 29,515.95 and 11,828.57 is: 16,322.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.24 : 29,515.95 = 11,828.57 : x
  2. Step 2: Convert to fraction form
    21,389.24/29,515.95 = 11,828.57/x
  3. Step 3: Cross multiply
    21,389.24x = 29,515.95 × 11,828.57
  4. Step 4: Simplify right side
    21,389.24x = 349,131,333.11
  5. Step 5: Solve for x
    x = 349,131,333.11/21,389.24
  6. Step 6: Final answer
    x = 16,322.75

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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.