Home / 21,639.34-29,859.87-12,206.08

Finding the Fourth Proportional to 21,639.34, 29,859.87 and 12,206.08

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Solution

The fourth proportional to 21,639.34, 29,859.87 and 12,206.08 is: 16,843.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.34 : 29,859.87 = 12,206.08 : x
  2. Step 2: Convert to fraction form
    21,639.34/29,859.87 = 12,206.08/x
  3. Step 3: Cross multiply
    21,639.34x = 29,859.87 × 12,206.08
  4. Step 4: Simplify right side
    21,639.34x = 364,471,962.01
  5. Step 5: Solve for x
    x = 364,471,962.01/21,639.34
  6. Step 6: Final answer
    x = 16,843.03

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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.