Home / 13,417.36-18,504.60-8,638.12

Finding the Fourth Proportional to 13,417.36, 18,504.60 and 8,638.12

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Solution

The fourth proportional to 13,417.36, 18,504.60 and 8,638.12 is: 11,913.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,417.36 : 18,504.60 = 8,638.12 : x
  2. Step 2: Convert to fraction form
    13,417.36/18,504.60 = 8,638.12/x
  3. Step 3: Cross multiply
    13,417.36x = 18,504.60 × 8,638.12
  4. Step 4: Simplify right side
    13,417.36x = 159,844,955.35
  5. Step 5: Solve for x
    x = 159,844,955.35/13,417.36
  6. Step 6: Final answer
    x = 11,913.29

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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.