Home / 15,015.87-20,722.70-8,643.43

Finding the Fourth Proportional to 15,015.87, 20,722.70 and 8,643.43

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Solution

The fourth proportional to 15,015.87, 20,722.70 and 8,643.43 is: 11,928.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.87 : 20,722.70 = 8,643.43 : x
  2. Step 2: Convert to fraction form
    15,015.87/20,722.70 = 8,643.43/x
  3. Step 3: Cross multiply
    15,015.87x = 20,722.70 × 8,643.43
  4. Step 4: Simplify right side
    15,015.87x = 179,115,206.86
  5. Step 5: Solve for x
    x = 179,115,206.86/15,015.87
  6. Step 6: Final answer
    x = 11,928.39

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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.