Home / 12,071.60-18,109.20-4,279.80

Finding the Fourth Proportional to 12,071.60, 18,109.20 and 4,279.80

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Solution

The fourth proportional to 12,071.60, 18,109.20 and 4,279.80 is: 6,420.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,071.60 : 18,109.20 = 4,279.80 : x
  2. Step 2: Convert to fraction form
    12,071.60/18,109.20 = 4,279.80/x
  3. Step 3: Cross multiply
    12,071.60x = 18,109.20 × 4,279.80
  4. Step 4: Simplify right side
    12,071.60x = 77,503,754.16
  5. Step 5: Solve for x
    x = 77,503,754.16/12,071.60
  6. Step 6: Final answer
    x = 6,420.34

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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.