Home / 13,678.08-20,519.88-4,319.55

Finding the Fourth Proportional to 13,678.08, 20,519.88 and 4,319.55

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Solution

The fourth proportional to 13,678.08, 20,519.88 and 4,319.55 is: 6,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.08 : 20,519.88 = 4,319.55 : x
  2. Step 2: Convert to fraction form
    13,678.08/20,519.88 = 4,319.55/x
  3. Step 3: Cross multiply
    13,678.08x = 20,519.88 × 4,319.55
  4. Step 4: Simplify right side
    13,678.08x = 88,636,647.65
  5. Step 5: Solve for x
    x = 88,636,647.65/13,678.08
  6. Step 6: Final answer
    x = 6,480.20

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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.