Home / 21,524.84-29,698.98-13,138.28

Finding the Fourth Proportional to 21,524.84, 29,698.98 and 13,138.28

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Solution

The fourth proportional to 21,524.84, 29,698.98 and 13,138.28 is: 18,127.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,524.84 : 29,698.98 = 13,138.28 : x
  2. Step 2: Convert to fraction form
    21,524.84/29,698.98 = 13,138.28/x
  3. Step 3: Cross multiply
    21,524.84x = 29,698.98 × 13,138.28
  4. Step 4: Simplify right side
    21,524.84x = 390,193,514.95
  5. Step 5: Solve for x
    x = 390,193,514.95/21,524.84
  6. Step 6: Final answer
    x = 18,127.59

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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.