Home / 12,445.40-18,667.70-4,125.80

Finding the Fourth Proportional to 12,445.40, 18,667.70 and 4,125.80

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Solution

The fourth proportional to 12,445.40, 18,667.70 and 4,125.80 is: 6,188.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.40 : 18,667.70 = 4,125.80 : x
  2. Step 2: Convert to fraction form
    12,445.40/18,667.70 = 4,125.80/x
  3. Step 3: Cross multiply
    12,445.40x = 18,667.70 × 4,125.80
  4. Step 4: Simplify right side
    12,445.40x = 77,019,196.66
  5. Step 5: Solve for x
    x = 77,019,196.66/12,445.40
  6. Step 6: Final answer
    x = 6,188.57

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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.