Home / 13,411.28-20,118.84-4,178

Finding the Fourth Proportional to 13,411.28, 20,118.84 and 4,178

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Solution

The fourth proportional to 13,411.28, 20,118.84 and 4,178 is: 6,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.28 : 20,118.84 = 4,178 : x
  2. Step 2: Convert to fraction form
    13,411.28/20,118.84 = 4,178/x
  3. Step 3: Cross multiply
    13,411.28x = 20,118.84 × 4,178
  4. Step 4: Simplify right side
    13,411.28x = 84,056,513.52
  5. Step 5: Solve for x
    x = 84,056,513.52/13,411.28
  6. Step 6: Final answer
    x = 6,267.60

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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.