Home / 21,114.68-31,666.62-7,963.16

Finding the Fourth Proportional to 21,114.68, 31,666.62 and 7,963.16

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Solution

The fourth proportional to 21,114.68, 31,666.62 and 7,963.16 is: 11,942.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.68 : 31,666.62 = 7,963.16 : x
  2. Step 2: Convert to fraction form
    21,114.68/31,666.62 = 7,963.16/x
  3. Step 3: Cross multiply
    21,114.68x = 31,666.62 × 7,963.16
  4. Step 4: Simplify right side
    21,114.68x = 252,166,361.72
  5. Step 5: Solve for x
    x = 252,166,361.72/21,114.68
  6. Step 6: Final answer
    x = 11,942.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.