Home / 15,015.36-20,720.70-8,300.88

Finding the Fourth Proportional to 15,015.36, 20,720.70 and 8,300.88

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Solution

The fourth proportional to 15,015.36, 20,720.70 and 8,300.88 is: 11,454.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.36 : 20,720.70 = 8,300.88 : x
  2. Step 2: Convert to fraction form
    15,015.36/20,720.70 = 8,300.88/x
  3. Step 3: Cross multiply
    15,015.36x = 20,720.70 × 8,300.88
  4. Step 4: Simplify right side
    15,015.36x = 172,000,044.22
  5. Step 5: Solve for x
    x = 172,000,044.22/15,015.36
  6. Step 6: Final answer
    x = 11,454.94

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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.