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Finding the Fourth Proportional to 15,361.18, 21,201.01 and 8,899.88

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Solution

The fourth proportional to 15,361.18, 21,201.01 and 8,899.88 is: 12,283.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.18 : 21,201.01 = 8,899.88 : x
  2. Step 2: Convert to fraction form
    15,361.18/21,201.01 = 8,899.88/x
  3. Step 3: Cross multiply
    15,361.18x = 21,201.01 × 8,899.88
  4. Step 4: Simplify right side
    15,361.18x = 188,686,316.62
  5. Step 5: Solve for x
    x = 188,686,316.62/15,361.18
  6. Step 6: Final answer
    x = 12,283.32

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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.