Home / 21,760.75-30,032.67-12,809.08

Finding the Fourth Proportional to 21,760.75, 30,032.67 and 12,809.08

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Solution

The fourth proportional to 21,760.75, 30,032.67 and 12,809.08 is: 17,678.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,760.75 : 30,032.67 = 12,809.08 : x
  2. Step 2: Convert to fraction form
    21,760.75/30,032.67 = 12,809.08/x
  3. Step 3: Cross multiply
    21,760.75x = 30,032.67 × 12,809.08
  4. Step 4: Simplify right side
    21,760.75x = 384,690,872.64
  5. Step 5: Solve for x
    x = 384,690,872.64/21,760.75
  6. Step 6: Final answer
    x = 17,678.20

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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.