Home / 15,015.58-20,720.61-8,300.68

Finding the Fourth Proportional to 15,015.58, 20,720.61 and 8,300.68

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Solution

The fourth proportional to 15,015.58, 20,720.61 and 8,300.68 is: 11,454.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.58 : 20,720.61 = 8,300.68 : x
  2. Step 2: Convert to fraction form
    15,015.58/20,720.61 = 8,300.68/x
  3. Step 3: Cross multiply
    15,015.58x = 20,720.61 × 8,300.68
  4. Step 4: Simplify right side
    15,015.58x = 171,995,101.21
  5. Step 5: Solve for x
    x = 171,995,101.21/15,015.58
  6. Step 6: Final answer
    x = 11,454.44

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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.