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Finding the Fourth Proportional to 28,118.88, 38,802.96 and 15,543.36

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Solution

The fourth proportional to 28,118.88, 38,802.96 and 15,543.36 is: 21,449.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.88 : 38,802.96 = 15,543.36 : x
  2. Step 2: Convert to fraction form
    28,118.88/38,802.96 = 15,543.36/x
  3. Step 3: Cross multiply
    28,118.88x = 38,802.96 × 15,543.36
  4. Step 4: Simplify right side
    28,118.88x = 603,128,376.35
  5. Step 5: Solve for x
    x = 603,128,376.35/28,118.88
  6. Step 6: Final answer
    x = 21,449.23

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.