Home / 21,439.49-29,577.06-12,936.87

Finding the Fourth Proportional to 21,439.49, 29,577.06 and 12,936.87

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Solution

The fourth proportional to 21,439.49, 29,577.06 and 12,936.87 is: 17,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.49 : 29,577.06 = 12,936.87 : x
  2. Step 2: Convert to fraction form
    21,439.49/29,577.06 = 12,936.87/x
  3. Step 3: Cross multiply
    21,439.49x = 29,577.06 × 12,936.87
  4. Step 4: Simplify right side
    21,439.49x = 382,634,367.63
  5. Step 5: Solve for x
    x = 382,634,367.63/21,439.49
  6. Step 6: Final answer
    x = 17,847.18

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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.