Home / 13,290.54-18,340.47-8,579.58

Finding the Fourth Proportional to 13,290.54, 18,340.47 and 8,579.58

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Solution

The fourth proportional to 13,290.54, 18,340.47 and 8,579.58 is: 11,839.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.54 : 18,340.47 = 8,579.58 : x
  2. Step 2: Convert to fraction form
    13,290.54/18,340.47 = 8,579.58/x
  3. Step 3: Cross multiply
    13,290.54x = 18,340.47 × 8,579.58
  4. Step 4: Simplify right side
    13,290.54x = 157,353,529.60
  5. Step 5: Solve for x
    x = 157,353,529.60/13,290.54
  6. Step 6: Final answer
    x = 11,839.51

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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.