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Finding the Fourth Proportional to 30,038.54, 45,057.35 and 8,978.11

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Solution

The fourth proportional to 30,038.54, 45,057.35 and 8,978.11 is: 13,467.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,038.54 : 45,057.35 = 8,978.11 : x
  2. Step 2: Convert to fraction form
    30,038.54/45,057.35 = 8,978.11/x
  3. Step 3: Cross multiply
    30,038.54x = 45,057.35 × 8,978.11
  4. Step 4: Simplify right side
    30,038.54x = 404,529,754.41
  5. Step 5: Solve for x
    x = 404,529,754.41/30,038.54
  6. Step 6: Final answer
    x = 13,467.03

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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.