Home / 12,071.86-18,112.78-6,518.67

Finding the Fourth Proportional to 12,071.86, 18,112.78 and 6,518.67

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Solution

The fourth proportional to 12,071.86, 18,112.78 and 6,518.67 is: 9,780.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,071.86 : 18,112.78 = 6,518.67 : x
  2. Step 2: Convert to fraction form
    12,071.86/18,112.78 = 6,518.67/x
  3. Step 3: Cross multiply
    12,071.86x = 18,112.78 × 6,518.67
  4. Step 4: Simplify right side
    12,071.86x = 118,071,235.60
  5. Step 5: Solve for x
    x = 118,071,235.60/12,071.86
  6. Step 6: Final answer
    x = 9,780.70

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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.