Home / 18,720.60-25,811.06-11,995.16

Finding the Fourth Proportional to 18,720.60, 25,811.06 and 11,995.16

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Solution

The fourth proportional to 18,720.60, 25,811.06 and 11,995.16 is: 16,538.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.60 : 25,811.06 = 11,995.16 : x
  2. Step 2: Convert to fraction form
    18,720.60/25,811.06 = 11,995.16/x
  3. Step 3: Cross multiply
    18,720.60x = 25,811.06 × 11,995.16
  4. Step 4: Simplify right side
    18,720.60x = 309,607,794.47
  5. Step 5: Solve for x
    x = 309,607,794.47/18,720.60
  6. Step 6: Final answer
    x = 16,538.35

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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.