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Finding the Fourth Proportional to 5,021.40, 6,928.81 and 2,783.40

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Solution

The fourth proportional to 5,021.40, 6,928.81 and 2,783.40 is: 3,840.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,021.40 : 6,928.81 = 2,783.40 : x
  2. Step 2: Convert to fraction form
    5,021.40/6,928.81 = 2,783.40/x
  3. Step 3: Cross multiply
    5,021.40x = 6,928.81 × 2,783.40
  4. Step 4: Simplify right side
    5,021.40x = 19,285,649.75
  5. Step 5: Solve for x
    x = 19,285,649.75/5,021.40
  6. Step 6: Final answer
    x = 3,840.69

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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.