Home / 15,922.36-21,899.82-12,771.64

Finding the Fourth Proportional to 15,922.36, 21,899.82 and 12,771.64

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Solution

The fourth proportional to 15,922.36, 21,899.82 and 12,771.64 is: 17,566.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,922.36 : 21,899.82 = 12,771.64 : x
  2. Step 2: Convert to fraction form
    15,922.36/21,899.82 = 12,771.64/x
  3. Step 3: Cross multiply
    15,922.36x = 21,899.82 × 12,771.64
  4. Step 4: Simplify right side
    15,922.36x = 279,696,617.10
  5. Step 5: Solve for x
    x = 279,696,617.10/15,922.36
  6. Step 6: Final answer
    x = 17,566.28

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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.