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Finding the Fourth Proportional to 28,017.36, 38,660.76 and 15,441.84

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Solution

The fourth proportional to 28,017.36, 38,660.76 and 15,441.84 is: 21,307.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,017.36 : 38,660.76 = 15,441.84 : x
  2. Step 2: Convert to fraction form
    28,017.36/38,660.76 = 15,441.84/x
  3. Step 3: Cross multiply
    28,017.36x = 38,660.76 × 15,441.84
  4. Step 4: Simplify right side
    28,017.36x = 596,993,270.20
  5. Step 5: Solve for x
    x = 596,993,270.20/28,017.36
  6. Step 6: Final answer
    x = 21,307.98

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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.