Home / 21,315.28-29,415.12-11,883.64

Finding the Fourth Proportional to 21,315.28, 29,415.12 and 11,883.64

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Solution

The fourth proportional to 21,315.28, 29,415.12 and 11,883.64 is: 16,399.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.28 : 29,415.12 = 11,883.64 : x
  2. Step 2: Convert to fraction form
    21,315.28/29,415.12 = 11,883.64/x
  3. Step 3: Cross multiply
    21,315.28x = 29,415.12 × 11,883.64
  4. Step 4: Simplify right side
    21,315.28x = 349,558,696.64
  5. Step 5: Solve for x
    x = 349,558,696.64/21,315.28
  6. Step 6: Final answer
    x = 16,399.44

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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.