Home / 21,282.35-29,378.70-13,322.88

Finding the Fourth Proportional to 21,282.35, 29,378.70 and 13,322.88

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Solution

The fourth proportional to 21,282.35, 29,378.70 and 13,322.88 is: 18,391.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.35 : 29,378.70 = 13,322.88 : x
  2. Step 2: Convert to fraction form
    21,282.35/29,378.70 = 13,322.88/x
  3. Step 3: Cross multiply
    21,282.35x = 29,378.70 × 13,322.88
  4. Step 4: Simplify right side
    21,282.35x = 391,408,894.66
  5. Step 5: Solve for x
    x = 391,408,894.66/21,282.35
  6. Step 6: Final answer
    x = 18,391.25

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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.