Home / 13,628.39-18,811.47-9,913.19

Finding the Fourth Proportional to 13,628.39, 18,811.47 and 9,913.19

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Solution

The fourth proportional to 13,628.39, 18,811.47 and 9,913.19 is: 13,683.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.39 : 18,811.47 = 9,913.19 : x
  2. Step 2: Convert to fraction form
    13,628.39/18,811.47 = 9,913.19/x
  3. Step 3: Cross multiply
    13,628.39x = 18,811.47 × 9,913.19
  4. Step 4: Simplify right side
    13,628.39x = 186,481,676.29
  5. Step 5: Solve for x
    x = 186,481,676.29/13,628.39
  6. Step 6: Final answer
    x = 13,683.32

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Double scale
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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.