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Finding the Fourth Proportional to 28,976.40, 43,448.40 and 13,374.72

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Solution

The fourth proportional to 28,976.40, 43,448.40 and 13,374.72 is: 20,054.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,976.40 : 43,448.40 = 13,374.72 : x
  2. Step 2: Convert to fraction form
    28,976.40/43,448.40 = 13,374.72/x
  3. Step 3: Cross multiply
    28,976.40x = 43,448.40 × 13,374.72
  4. Step 4: Simplify right side
    28,976.40x = 581,110,184.45
  5. Step 5: Solve for x
    x = 581,110,184.45/28,976.40
  6. Step 6: Final answer
    x = 20,054.60

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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.