Home / 13,639.40-18,811.14-8,045

Finding the Fourth Proportional to 13,639.40, 18,811.14 and 8,045

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Solution

The fourth proportional to 13,639.40, 18,811.14 and 8,045 is: 11,095.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.40 : 18,811.14 = 8,045 : x
  2. Step 2: Convert to fraction form
    13,639.40/18,811.14 = 8,045/x
  3. Step 3: Cross multiply
    13,639.40x = 18,811.14 × 8,045
  4. Step 4: Simplify right side
    13,639.40x = 151,335,621.30
  5. Step 5: Solve for x
    x = 151,335,621.30/13,639.40
  6. Step 6: Final answer
    x = 11,095.47

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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.