Home / 13,389.68-18,489.12-9,419.60

Finding the Fourth Proportional to 13,389.68, 18,489.12 and 9,419.60

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Solution

The fourth proportional to 13,389.68, 18,489.12 and 9,419.60 is: 13,007.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.68 : 18,489.12 = 9,419.60 : x
  2. Step 2: Convert to fraction form
    13,389.68/18,489.12 = 9,419.60/x
  3. Step 3: Cross multiply
    13,389.68x = 18,489.12 × 9,419.60
  4. Step 4: Simplify right side
    13,389.68x = 174,160,114.75
  5. Step 5: Solve for x
    x = 174,160,114.75/13,389.68
  6. Step 6: Final answer
    x = 13,007.04

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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.