Home / 13,720.10-20,587.78-6,700.20

Finding the Fourth Proportional to 13,720.10, 20,587.78 and 6,700.20

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Solution

The fourth proportional to 13,720.10, 20,587.78 and 6,700.20 is: 10,054.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.10 : 20,587.78 = 6,700.20 : x
  2. Step 2: Convert to fraction form
    13,720.10/20,587.78 = 6,700.20/x
  3. Step 3: Cross multiply
    13,720.10x = 20,587.78 × 6,700.20
  4. Step 4: Simplify right side
    13,720.10x = 137,942,243.56
  5. Step 5: Solve for x
    x = 137,942,243.56/13,720.10
  6. Step 6: Final answer
    x = 10,054.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.