Home / 20,964.20-28,944.42-13,018.28

Finding the Fourth Proportional to 20,964.20, 28,944.42 and 13,018.28

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Solution

The fourth proportional to 20,964.20, 28,944.42 and 13,018.28 is: 17,973.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.20 : 28,944.42 = 13,018.28 : x
  2. Step 2: Convert to fraction form
    20,964.20/28,944.42 = 13,018.28/x
  3. Step 3: Cross multiply
    20,964.20x = 28,944.42 × 13,018.28
  4. Step 4: Simplify right side
    20,964.20x = 376,806,564.00
  5. Step 5: Solve for x
    x = 376,806,564.00/20,964.20
  6. Step 6: Final answer
    x = 17,973.81

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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.