Home / 20,319.36-28,028.16-13,943.04

Finding the Fourth Proportional to 20,319.36, 28,028.16 and 13,943.04

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Solution

The fourth proportional to 20,319.36, 28,028.16 and 13,943.04 is: 19,232.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.36 : 28,028.16 = 13,943.04 : x
  2. Step 2: Convert to fraction form
    20,319.36/28,028.16 = 13,943.04/x
  3. Step 3: Cross multiply
    20,319.36x = 28,028.16 × 13,943.04
  4. Step 4: Simplify right side
    20,319.36x = 390,797,756.01
  5. Step 5: Solve for x
    x = 390,797,756.01/20,319.36
  6. Step 6: Final answer
    x = 19,232.78

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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.