Home / 15,690.37-21,651.43-8,616.79

Finding the Fourth Proportional to 15,690.37, 21,651.43 and 8,616.79

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Solution

The fourth proportional to 15,690.37, 21,651.43 and 8,616.79 is: 11,890.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.37 : 21,651.43 = 8,616.79 : x
  2. Step 2: Convert to fraction form
    15,690.37/21,651.43 = 8,616.79/x
  3. Step 3: Cross multiply
    15,690.37x = 21,651.43 × 8,616.79
  4. Step 4: Simplify right side
    15,690.37x = 186,565,825.51
  5. Step 5: Solve for x
    x = 186,565,825.51/15,690.37
  6. Step 6: Final answer
    x = 11,890.47

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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.