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Finding the Fourth Proportional to 15,471.46, 21,361.71 and 9,511.12

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Solution

The fourth proportional to 15,471.46, 21,361.71 and 9,511.12 is: 13,132.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.46 : 21,361.71 = 9,511.12 : x
  2. Step 2: Convert to fraction form
    15,471.46/21,361.71 = 9,511.12/x
  3. Step 3: Cross multiply
    15,471.46x = 21,361.71 × 9,511.12
  4. Step 4: Simplify right side
    15,471.46x = 203,173,787.22
  5. Step 5: Solve for x
    x = 203,173,787.22/15,471.46
  6. Step 6: Final answer
    x = 13,132.17

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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.