Home / 21,108.40-29,133.18-12,161.08

Finding the Fourth Proportional to 21,108.40, 29,133.18 and 12,161.08

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Solution

The fourth proportional to 21,108.40, 29,133.18 and 12,161.08 is: 16,784.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.40 : 29,133.18 = 12,161.08 : x
  2. Step 2: Convert to fraction form
    21,108.40/29,133.18 = 12,161.08/x
  3. Step 3: Cross multiply
    21,108.40x = 29,133.18 × 12,161.08
  4. Step 4: Simplify right side
    21,108.40x = 354,290,932.63
  5. Step 5: Solve for x
    x = 354,290,932.63/21,108.40
  6. Step 6: Final answer
    x = 16,784.36

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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.