Home / 21,208.12-29,280.36-13,667.44

Finding the Fourth Proportional to 21,208.12, 29,280.36 and 13,667.44

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Solution

The fourth proportional to 21,208.12, 29,280.36 and 13,667.44 is: 18,869.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.12 : 29,280.36 = 13,667.44 : x
  2. Step 2: Convert to fraction form
    21,208.12/29,280.36 = 13,667.44/x
  3. Step 3: Cross multiply
    21,208.12x = 29,280.36 × 13,667.44
  4. Step 4: Simplify right side
    21,208.12x = 400,187,563.48
  5. Step 5: Solve for x
    x = 400,187,563.48/21,208.12
  6. Step 6: Final answer
    x = 18,869.54

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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.