Home / 21,161.30-29,200.64-12,661.79

Finding the Fourth Proportional to 21,161.30, 29,200.64 and 12,661.79

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Solution

The fourth proportional to 21,161.30, 29,200.64 and 12,661.79 is: 17,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.30 : 29,200.64 = 12,661.79 : x
  2. Step 2: Convert to fraction form
    21,161.30/29,200.64 = 12,661.79/x
  3. Step 3: Cross multiply
    21,161.30x = 29,200.64 × 12,661.79
  4. Step 4: Simplify right side
    21,161.30x = 369,732,162.23
  5. Step 5: Solve for x
    x = 369,732,162.23/21,161.30
  6. Step 6: Final answer
    x = 17,472.10

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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.