Home / 13,406.28-18,483.64-11,137.20

Finding the Fourth Proportional to 13,406.28, 18,483.64 and 11,137.20

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Solution

The fourth proportional to 13,406.28, 18,483.64 and 11,137.20 is: 15,355.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.28 : 18,483.64 = 11,137.20 : x
  2. Step 2: Convert to fraction form
    13,406.28/18,483.64 = 11,137.20/x
  3. Step 3: Cross multiply
    13,406.28x = 18,483.64 × 11,137.20
  4. Step 4: Simplify right side
    13,406.28x = 205,855,995.41
  5. Step 5: Solve for x
    x = 205,855,995.41/13,406.28
  6. Step 6: Final answer
    x = 15,355.19

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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.