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Finding the Fourth Proportional to 15,435.46, 21,300.91 and 8,361.91

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Solution

The fourth proportional to 15,435.46, 21,300.91 and 8,361.91 is: 11,539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.46 : 21,300.91 = 8,361.91 : x
  2. Step 2: Convert to fraction form
    15,435.46/21,300.91 = 8,361.91/x
  3. Step 3: Cross multiply
    15,435.46x = 21,300.91 × 8,361.91
  4. Step 4: Simplify right side
    15,435.46x = 178,116,292.34
  5. Step 5: Solve for x
    x = 178,116,292.34/15,435.46
  6. Step 6: Final answer
    x = 11,539.42

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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.