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Finding the Fourth Proportional to 13,779.66, 19,015.52 and 8,113.11

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Solution

The fourth proportional to 13,779.66, 19,015.52 and 8,113.11 is: 11,195.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.66 : 19,015.52 = 8,113.11 : x
  2. Step 2: Convert to fraction form
    13,779.66/19,015.52 = 8,113.11/x
  3. Step 3: Cross multiply
    13,779.66x = 19,015.52 × 8,113.11
  4. Step 4: Simplify right side
    13,779.66x = 154,274,964.90
  5. Step 5: Solve for x
    x = 154,274,964.90/13,779.66
  6. Step 6: Final answer
    x = 11,195.85

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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.