Home / 21,863.92-30,165.08-12,908.40

Finding the Fourth Proportional to 21,863.92, 30,165.08 and 12,908.40

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Solution

The fourth proportional to 21,863.92, 30,165.08 and 12,908.40 is: 17,809.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.92 : 30,165.08 = 12,908.40 : x
  2. Step 2: Convert to fraction form
    21,863.92/30,165.08 = 12,908.40/x
  3. Step 3: Cross multiply
    21,863.92x = 30,165.08 × 12,908.40
  4. Step 4: Simplify right side
    21,863.92x = 389,382,918.67
  5. Step 5: Solve for x
    x = 389,382,918.67/21,863.92
  6. Step 6: Final answer
    x = 17,809.38

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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.