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Finding the Fourth Proportional to 10,855.53, 14,980.74 and 6,379.35

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Solution

The fourth proportional to 10,855.53, 14,980.74 and 6,379.35 is: 8,803.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,855.53 : 14,980.74 = 6,379.35 : x
  2. Step 2: Convert to fraction form
    10,855.53/14,980.74 = 6,379.35/x
  3. Step 3: Cross multiply
    10,855.53x = 14,980.74 × 6,379.35
  4. Step 4: Simplify right side
    10,855.53x = 95,567,383.72
  5. Step 5: Solve for x
    x = 95,567,383.72/10,855.53
  6. Step 6: Final answer
    x = 8,803.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.