Home / 13,405.68-18,511.20-9,435.60

Finding the Fourth Proportional to 13,405.68, 18,511.20 and 9,435.60

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Solution

The fourth proportional to 13,405.68, 18,511.20 and 9,435.60 is: 13,029.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.68 : 18,511.20 = 9,435.60 : x
  2. Step 2: Convert to fraction form
    13,405.68/18,511.20 = 9,435.60/x
  3. Step 3: Cross multiply
    13,405.68x = 18,511.20 × 9,435.60
  4. Step 4: Simplify right side
    13,405.68x = 174,664,278.72
  5. Step 5: Solve for x
    x = 174,664,278.72/13,405.68
  6. Step 6: Final answer
    x = 13,029.12

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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.