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Finding the Fourth Proportional to 30,903.44, 46,377.56 and 21,019.28

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Solution

The fourth proportional to 30,903.44, 46,377.56 and 21,019.28 is: 31,544.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,903.44 : 46,377.56 = 21,019.28 : x
  2. Step 2: Convert to fraction form
    30,903.44/46,377.56 = 21,019.28/x
  3. Step 3: Cross multiply
    30,903.44x = 46,377.56 × 21,019.28
  4. Step 4: Simplify right side
    30,903.44x = 974,822,919.36
  5. Step 5: Solve for x
    x = 974,822,919.36/30,903.44
  6. Step 6: Final answer
    x = 31,544.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.