Home / 21,893.95-30,208.08-13,392.97

Finding the Fourth Proportional to 21,893.95, 30,208.08 and 13,392.97

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Solution

The fourth proportional to 21,893.95, 30,208.08 and 13,392.97 is: 18,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.95 : 30,208.08 = 13,392.97 : x
  2. Step 2: Convert to fraction form
    21,893.95/30,208.08 = 13,392.97/x
  3. Step 3: Cross multiply
    21,893.95x = 30,208.08 × 13,392.97
  4. Step 4: Simplify right side
    21,893.95x = 404,575,909.20
  5. Step 5: Solve for x
    x = 404,575,909.20/21,893.95
  6. Step 6: Final answer
    x = 18,478.89

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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.