Home / 12,645.08-18,951.21-8,478.84

Finding the Fourth Proportional to 12,645.08, 18,951.21 and 8,478.84

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Solution

The fourth proportional to 12,645.08, 18,951.21 and 8,478.84 is: 12,707.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.08 : 18,951.21 = 8,478.84 : x
  2. Step 2: Convert to fraction form
    12,645.08/18,951.21 = 8,478.84/x
  3. Step 3: Cross multiply
    12,645.08x = 18,951.21 × 8,478.84
  4. Step 4: Simplify right side
    12,645.08x = 160,684,277.40
  5. Step 5: Solve for x
    x = 160,684,277.40/12,645.08
  6. Step 6: Final answer
    x = 12,707.26

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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.