Home / 15,409.64-21,277.14-12,772.28

Finding the Fourth Proportional to 15,409.64, 21,277.14 and 12,772.28

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Solution

The fourth proportional to 15,409.64, 21,277.14 and 12,772.28 is: 17,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.64 : 21,277.14 = 12,772.28 : x
  2. Step 2: Convert to fraction form
    15,409.64/21,277.14 = 12,772.28/x
  3. Step 3: Cross multiply
    15,409.64x = 21,277.14 × 12,772.28
  4. Step 4: Simplify right side
    15,409.64x = 271,757,589.68
  5. Step 5: Solve for x
    x = 271,757,589.68/15,409.64
  6. Step 6: Final answer
    x = 17,635.56

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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.