Home / 20,935.83-28,887.36-13,376.34

Finding the Fourth Proportional to 20,935.83, 28,887.36 and 13,376.34

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Solution

The fourth proportional to 20,935.83, 28,887.36 and 13,376.34 is: 18,456.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.83 : 28,887.36 = 13,376.34 : x
  2. Step 2: Convert to fraction form
    20,935.83/28,887.36 = 13,376.34/x
  3. Step 3: Cross multiply
    20,935.83x = 28,887.36 × 13,376.34
  4. Step 4: Simplify right side
    20,935.83x = 386,407,149.06
  5. Step 5: Solve for x
    x = 386,407,149.06/20,935.83
  6. Step 6: Final answer
    x = 18,456.74

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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.