Home / 13,820.36-20,730.56-10,900.72

Finding the Fourth Proportional to 13,820.36, 20,730.56 and 10,900.72

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Solution

The fourth proportional to 13,820.36, 20,730.56 and 10,900.72 is: 16,351.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.36 : 20,730.56 = 10,900.72 : x
  2. Step 2: Convert to fraction form
    13,820.36/20,730.56 = 10,900.72/x
  3. Step 3: Cross multiply
    13,820.36x = 20,730.56 × 10,900.72
  4. Step 4: Simplify right side
    13,820.36x = 225,978,030.00
  5. Step 5: Solve for x
    x = 225,978,030.00/13,820.36
  6. Step 6: Final answer
    x = 16,351.10

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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.