Home / 21,087.54-29,104.85-13,543.40

Finding the Fourth Proportional to 21,087.54, 29,104.85 and 13,543.40

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Solution

The fourth proportional to 21,087.54, 29,104.85 and 13,543.40 is: 18,692.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.54 : 29,104.85 = 13,543.40 : x
  2. Step 2: Convert to fraction form
    21,087.54/29,104.85 = 13,543.40/x
  3. Step 3: Cross multiply
    21,087.54x = 29,104.85 × 13,543.40
  4. Step 4: Simplify right side
    21,087.54x = 394,178,732.11
  5. Step 5: Solve for x
    x = 394,178,732.11/21,087.54
  6. Step 6: Final answer
    x = 18,692.49

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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.