Home / 25,116.75-34,661.25-15,690.78

Finding the Fourth Proportional to 25,116.75, 34,661.25 and 15,690.78

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Solution

The fourth proportional to 25,116.75, 34,661.25 and 15,690.78 is: 21,653.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,116.75 : 34,661.25 = 15,690.78 : x
  2. Step 2: Convert to fraction form
    25,116.75/34,661.25 = 15,690.78/x
  3. Step 3: Cross multiply
    25,116.75x = 34,661.25 × 15,690.78
  4. Step 4: Simplify right side
    25,116.75x = 543,862,048.28
  5. Step 5: Solve for x
    x = 543,862,048.28/25,116.75
  6. Step 6: Final answer
    x = 21,653.36

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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.