Home / 20,944.84-28,899.80-13,385.36

Finding the Fourth Proportional to 20,944.84, 28,899.80 and 13,385.36

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Solution

The fourth proportional to 20,944.84, 28,899.80 and 13,385.36 is: 18,469.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,944.84 : 28,899.80 = 13,385.36 : x
  2. Step 2: Convert to fraction form
    20,944.84/28,899.80 = 13,385.36/x
  3. Step 3: Cross multiply
    20,944.84x = 28,899.80 × 13,385.36
  4. Step 4: Simplify right side
    20,944.84x = 386,834,226.93
  5. Step 5: Solve for x
    x = 386,834,226.93/20,944.84
  6. Step 6: Final answer
    x = 18,469.19

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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.