Home / 21,169.52-31,760.86-8,690.56

Finding the Fourth Proportional to 21,169.52, 31,760.86 and 8,690.56

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Solution

The fourth proportional to 21,169.52, 31,760.86 and 8,690.56 is: 13,038.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.52 : 31,760.86 = 8,690.56 : x
  2. Step 2: Convert to fraction form
    21,169.52/31,760.86 = 8,690.56/x
  3. Step 3: Cross multiply
    21,169.52x = 31,760.86 × 8,690.56
  4. Step 4: Simplify right side
    21,169.52x = 276,019,659.48
  5. Step 5: Solve for x
    x = 276,019,659.48/21,169.52
  6. Step 6: Final answer
    x = 13,038.54

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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.