Home / 21,168.52-31,759.36-8,689.56

Finding the Fourth Proportional to 21,168.52, 31,759.36 and 8,689.56

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Solution

The fourth proportional to 21,168.52, 31,759.36 and 8,689.56 is: 13,037.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.52 : 31,759.36 = 8,689.56 : x
  2. Step 2: Convert to fraction form
    21,168.52/31,759.36 = 8,689.56/x
  3. Step 3: Cross multiply
    21,168.52x = 31,759.36 × 8,689.56
  4. Step 4: Simplify right side
    21,168.52x = 275,974,864.28
  5. Step 5: Solve for x
    x = 275,974,864.28/21,168.52
  6. Step 6: Final answer
    x = 13,037.04

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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.