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Finding the Fourth Proportional to 11,509.83, 15,885.09 and 6,731.19

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Solution

The fourth proportional to 11,509.83, 15,885.09 and 6,731.19 is: 9,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,509.83 : 15,885.09 = 6,731.19 : x
  2. Step 2: Convert to fraction form
    11,509.83/15,885.09 = 6,731.19/x
  3. Step 3: Cross multiply
    11,509.83x = 15,885.09 × 6,731.19
  4. Step 4: Simplify right side
    11,509.83x = 106,925,558.96
  5. Step 5: Solve for x
    x = 106,925,558.96/11,509.83
  6. Step 6: Final answer
    x = 9,289.93

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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.