Home / 15,911.36-21,884.64-12,760.64

Finding the Fourth Proportional to 15,911.36, 21,884.64 and 12,760.64

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Solution

The fourth proportional to 15,911.36, 21,884.64 and 12,760.64 is: 17,551.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.36 : 21,884.64 = 12,760.64 : x
  2. Step 2: Convert to fraction form
    15,911.36/21,884.64 = 12,760.64/x
  3. Step 3: Cross multiply
    15,911.36x = 21,884.64 × 12,760.64
  4. Step 4: Simplify right side
    15,911.36x = 279,262,012.57
  5. Step 5: Solve for x
    x = 279,262,012.57/15,911.36
  6. Step 6: Final answer
    x = 17,551.11

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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.