Home / 25,990.25-38,987.81-8,455.37

Finding the Fourth Proportional to 25,990.25, 38,987.81 and 8,455.37

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Solution

The fourth proportional to 25,990.25, 38,987.81 and 8,455.37 is: 12,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,990.25 : 38,987.81 = 8,455.37 : x
  2. Step 2: Convert to fraction form
    25,990.25/38,987.81 = 8,455.37/x
  3. Step 3: Cross multiply
    25,990.25x = 38,987.81 × 8,455.37
  4. Step 4: Simplify right side
    25,990.25x = 329,656,359.04
  5. Step 5: Solve for x
    x = 329,656,359.04/25,990.25
  6. Step 6: Final answer
    x = 12,683.85

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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.