Home / 20,708.16-28,571.04-18,712.32

Finding the Fourth Proportional to 20,708.16, 28,571.04 and 18,712.32

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Solution

The fourth proportional to 20,708.16, 28,571.04 and 18,712.32 is: 25,817.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.16 : 28,571.04 = 18,712.32 : x
  2. Step 2: Convert to fraction form
    20,708.16/28,571.04 = 18,712.32/x
  3. Step 3: Cross multiply
    20,708.16x = 28,571.04 × 18,712.32
  4. Step 4: Simplify right side
    20,708.16x = 534,630,443.21
  5. Step 5: Solve for x
    x = 534,630,443.21/20,708.16
  6. Step 6: Final answer
    x = 25,817.38

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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.