Home / 18,720.30-25,835.95-11,456.62

Finding the Fourth Proportional to 18,720.30, 25,835.95 and 11,456.62

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Solution

The fourth proportional to 18,720.30, 25,835.95 and 11,456.62 is: 15,811.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.30 : 25,835.95 = 11,456.62 : x
  2. Step 2: Convert to fraction form
    18,720.30/25,835.95 = 11,456.62/x
  3. Step 3: Cross multiply
    18,720.30x = 25,835.95 × 11,456.62
  4. Step 4: Simplify right side
    18,720.30x = 295,992,661.49
  5. Step 5: Solve for x
    x = 295,992,661.49/18,720.30
  6. Step 6: Final answer
    x = 15,811.32

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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.