Home / 20,739.36-28,617.77-12,677.07

Finding the Fourth Proportional to 20,739.36, 28,617.77 and 12,677.07

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Solution

The fourth proportional to 20,739.36, 28,617.77 and 12,677.07 is: 17,492.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.36 : 28,617.77 = 12,677.07 : x
  2. Step 2: Convert to fraction form
    20,739.36/28,617.77 = 12,677.07/x
  3. Step 3: Cross multiply
    20,739.36x = 28,617.77 × 12,677.07
  4. Step 4: Simplify right side
    20,739.36x = 362,789,612.54
  5. Step 5: Solve for x
    x = 362,789,612.54/20,739.36
  6. Step 6: Final answer
    x = 17,492.81

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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.