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Finding the Fourth Proportional to 25,653.70, 38,478.12 and 8,122.06

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Solution

The fourth proportional to 25,653.70, 38,478.12 and 8,122.06 is: 12,182.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,653.70 : 38,478.12 = 8,122.06 : x
  2. Step 2: Convert to fraction form
    25,653.70/38,478.12 = 8,122.06/x
  3. Step 3: Cross multiply
    25,653.70x = 38,478.12 × 8,122.06
  4. Step 4: Simplify right side
    25,653.70x = 312,521,599.33
  5. Step 5: Solve for x
    x = 312,521,599.33/25,653.70
  6. Step 6: Final answer
    x = 12,182.32

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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.