Home / 8,619.01-12,918.83-4,390.40

Finding the Fourth Proportional to 8,619.01, 12,918.83 and 4,390.40

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Solution

The fourth proportional to 8,619.01, 12,918.83 and 4,390.40 is: 6,580.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.01 : 12,918.83 = 4,390.40 : x
  2. Step 2: Convert to fraction form
    8,619.01/12,918.83 = 4,390.40/x
  3. Step 3: Cross multiply
    8,619.01x = 12,918.83 × 4,390.40
  4. Step 4: Simplify right side
    8,619.01x = 56,718,841.58
  5. Step 5: Solve for x
    x = 56,718,841.58/8,619.01
  6. Step 6: Final answer
    x = 6,580.67

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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.