Home / 21,971.88-30,320.10-12,896.01

Finding the Fourth Proportional to 21,971.88, 30,320.10 and 12,896.01

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Solution

The fourth proportional to 21,971.88, 30,320.10 and 12,896.01 is: 17,795.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.88 : 30,320.10 = 12,896.01 : x
  2. Step 2: Convert to fraction form
    21,971.88/30,320.10 = 12,896.01/x
  3. Step 3: Cross multiply
    21,971.88x = 30,320.10 × 12,896.01
  4. Step 4: Simplify right side
    21,971.88x = 391,008,312.80
  5. Step 5: Solve for x
    x = 391,008,312.80/21,971.88
  6. Step 6: Final answer
    x = 17,795.85

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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.