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Finding the Fourth Proportional to 15,482.12, 21,364.76 and 8,408.40

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Solution

The fourth proportional to 15,482.12, 21,364.76 and 8,408.40 is: 11,603.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,482.12 : 21,364.76 = 8,408.40 : x
  2. Step 2: Convert to fraction form
    15,482.12/21,364.76 = 8,408.40/x
  3. Step 3: Cross multiply
    15,482.12x = 21,364.76 × 8,408.40
  4. Step 4: Simplify right side
    15,482.12x = 179,643,447.98
  5. Step 5: Solve for x
    x = 179,643,447.98/15,482.12
  6. Step 6: Final answer
    x = 11,603.28

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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.