Home / 29,286.81-40,415.85-15,858.21

Finding the Fourth Proportional to 29,286.81, 40,415.85 and 15,858.21

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Solution

The fourth proportional to 29,286.81, 40,415.85 and 15,858.21 is: 21,884.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,286.81 : 40,415.85 = 15,858.21 : x
  2. Step 2: Convert to fraction form
    29,286.81/40,415.85 = 15,858.21/x
  3. Step 3: Cross multiply
    29,286.81x = 40,415.85 × 15,858.21
  4. Step 4: Simplify right side
    29,286.81x = 640,923,036.63
  5. Step 5: Solve for x
    x = 640,923,036.63/29,286.81
  6. Step 6: Final answer
    x = 21,884.36

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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.