Home / 13,388.61-18,477.54-8,087.79

Finding the Fourth Proportional to 13,388.61, 18,477.54 and 8,087.79

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Solution

The fourth proportional to 13,388.61, 18,477.54 and 8,087.79 is: 11,161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.61 : 18,477.54 = 8,087.79 : x
  2. Step 2: Convert to fraction form
    13,388.61/18,477.54 = 8,087.79/x
  3. Step 3: Cross multiply
    13,388.61x = 18,477.54 × 8,087.79
  4. Step 4: Simplify right side
    13,388.61x = 149,442,463.24
  5. Step 5: Solve for x
    x = 149,442,463.24/13,388.61
  6. Step 6: Final answer
    x = 11,161.91

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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.