Home / 11,005.71-15,187.56-6,289.98

Finding the Fourth Proportional to 11,005.71, 15,187.56 and 6,289.98

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Solution

The fourth proportional to 11,005.71, 15,187.56 and 6,289.98 is: 8,679.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.71 : 15,187.56 = 6,289.98 : x
  2. Step 2: Convert to fraction form
    11,005.71/15,187.56 = 6,289.98/x
  3. Step 3: Cross multiply
    11,005.71x = 15,187.56 × 6,289.98
  4. Step 4: Simplify right side
    11,005.71x = 95,529,448.65
  5. Step 5: Solve for x
    x = 95,529,448.65/11,005.71
  6. Step 6: Final answer
    x = 8,679.99

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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.