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Finding the Fourth Proportional to 15,333.95, 21,161.06 and 8,619.18

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Solution

The fourth proportional to 15,333.95, 21,161.06 and 8,619.18 is: 11,894.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,333.95 : 21,161.06 = 8,619.18 : x
  2. Step 2: Convert to fraction form
    15,333.95/21,161.06 = 8,619.18/x
  3. Step 3: Cross multiply
    15,333.95x = 21,161.06 × 8,619.18
  4. Step 4: Simplify right side
    15,333.95x = 182,390,942.03
  5. Step 5: Solve for x
    x = 182,390,942.03/15,333.95
  6. Step 6: Final answer
    x = 11,894.59

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1.5x scale

Why These Related Problems?

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