Home / 3,038.40-4,188.96-2,105.28

Finding the Fourth Proportional to 3,038.40, 4,188.96 and 2,105.28

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Solution

The fourth proportional to 3,038.40, 4,188.96 and 2,105.28 is: 2,902.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,038.40 : 4,188.96 = 2,105.28 : x
  2. Step 2: Convert to fraction form
    3,038.40/4,188.96 = 2,105.28/x
  3. Step 3: Cross multiply
    3,038.40x = 4,188.96 × 2,105.28
  4. Step 4: Simplify right side
    3,038.40x = 8,818,933.71
  5. Step 5: Solve for x
    x = 8,818,933.71/3,038.40
  6. Step 6: Final answer
    x = 2,902.49

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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.