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Finding the Fourth Proportional to 12,159.63, 16,779.81 and 6,855.57

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Solution

The fourth proportional to 12,159.63, 16,779.81 and 6,855.57 is: 9,460.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.63 : 16,779.81 = 6,855.57 : x
  2. Step 2: Convert to fraction form
    12,159.63/16,779.81 = 6,855.57/x
  3. Step 3: Cross multiply
    12,159.63x = 16,779.81 × 6,855.57
  4. Step 4: Simplify right side
    12,159.63x = 115,035,162.04
  5. Step 5: Solve for x
    x = 115,035,162.04/12,159.63
  6. Step 6: Final answer
    x = 9,460.42

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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.