Home / 21,664.41-29,880.88-13,698.91

Finding the Fourth Proportional to 21,664.41, 29,880.88 and 13,698.91

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Solution

The fourth proportional to 21,664.41, 29,880.88 and 13,698.91 is: 18,894.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,664.41 : 29,880.88 = 13,698.91 : x
  2. Step 2: Convert to fraction form
    21,664.41/29,880.88 = 13,698.91/x
  3. Step 3: Cross multiply
    21,664.41x = 29,880.88 × 13,698.91
  4. Step 4: Simplify right side
    21,664.41x = 409,335,485.84
  5. Step 5: Solve for x
    x = 409,335,485.84/21,664.41
  6. Step 6: Final answer
    x = 18,894.37

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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.