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Finding the Fourth Proportional to 14,779.85, 20,395.55 and 8,065.31

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Solution

The fourth proportional to 14,779.85, 20,395.55 and 8,065.31 is: 11,129.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,779.85 : 20,395.55 = 8,065.31 : x
  2. Step 2: Convert to fraction form
    14,779.85/20,395.55 = 8,065.31/x
  3. Step 3: Cross multiply
    14,779.85x = 20,395.55 × 8,065.31
  4. Step 4: Simplify right side
    14,779.85x = 164,496,433.37
  5. Step 5: Solve for x
    x = 164,496,433.37/14,779.85
  6. Step 6: Final answer
    x = 11,129.78

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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.