Home / 21,859.84-30,167.96-12,431.44

Finding the Fourth Proportional to 21,859.84, 30,167.96 and 12,431.44

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Solution

The fourth proportional to 21,859.84, 30,167.96 and 12,431.44 is: 17,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.84 : 30,167.96 = 12,431.44 : x
  2. Step 2: Convert to fraction form
    21,859.84/30,167.96 = 12,431.44/x
  3. Step 3: Cross multiply
    21,859.84x = 30,167.96 × 12,431.44
  4. Step 4: Simplify right side
    21,859.84x = 375,031,184.66
  5. Step 5: Solve for x
    x = 375,031,184.66/21,859.84
  6. Step 6: Final answer
    x = 17,156.17

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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.