Home / 21,881.61-30,196.80-12,450.78

Finding the Fourth Proportional to 21,881.61, 30,196.80 and 12,450.78

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Solution

The fourth proportional to 21,881.61, 30,196.80 and 12,450.78 is: 17,182.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.61 : 30,196.80 = 12,450.78 : x
  2. Step 2: Convert to fraction form
    21,881.61/30,196.80 = 12,450.78/x
  3. Step 3: Cross multiply
    21,881.61x = 30,196.80 × 12,450.78
  4. Step 4: Simplify right side
    21,881.61x = 375,973,713.50
  5. Step 5: Solve for x
    x = 375,973,713.50/21,881.61
  6. Step 6: Final answer
    x = 17,182.18

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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.