Home / 12,811.08-19,228.60-7,890.32

Finding the Fourth Proportional to 12,811.08, 19,228.60 and 7,890.32

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Solution

The fourth proportional to 12,811.08, 19,228.60 and 7,890.32 is: 11,842.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.08 : 19,228.60 = 7,890.32 : x
  2. Step 2: Convert to fraction form
    12,811.08/19,228.60 = 7,890.32/x
  3. Step 3: Cross multiply
    12,811.08x = 19,228.60 × 7,890.32
  4. Step 4: Simplify right side
    12,811.08x = 151,719,807.15
  5. Step 5: Solve for x
    x = 151,719,807.15/12,811.08
  6. Step 6: Final answer
    x = 11,842.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.