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Finding the Fourth Proportional to 38,978.28, 58,470.26 and 13,322.34

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Solution

The fourth proportional to 38,978.28, 58,470.26 and 13,322.34 is: 19,984.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,978.28 : 58,470.26 = 13,322.34 : x
  2. Step 2: Convert to fraction form
    38,978.28/58,470.26 = 13,322.34/x
  3. Step 3: Cross multiply
    38,978.28x = 58,470.26 × 13,322.34
  4. Step 4: Simplify right side
    38,978.28x = 778,960,617.00
  5. Step 5: Solve for x
    x = 778,960,617.00/38,978.28
  6. Step 6: Final answer
    x = 19,984.48

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