Home / 18,722.50-25,815.99-15,308.86

Finding the Fourth Proportional to 18,722.50, 25,815.99 and 15,308.86

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Solution

The fourth proportional to 18,722.50, 25,815.99 and 15,308.86 is: 21,109.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.50 : 25,815.99 = 15,308.86 : x
  2. Step 2: Convert to fraction form
    18,722.50/25,815.99 = 15,308.86/x
  3. Step 3: Cross multiply
    18,722.50x = 25,815.99 × 15,308.86
  4. Step 4: Simplify right side
    18,722.50x = 395,213,376.67
  5. Step 5: Solve for x
    x = 395,213,376.67/18,722.50
  6. Step 6: Final answer
    x = 21,109.01

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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.