Home / 21,133.60-29,161.56-11,700.88

Finding the Fourth Proportional to 21,133.60, 29,161.56 and 11,700.88

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Solution

The fourth proportional to 21,133.60, 29,161.56 and 11,700.88 is: 16,145.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.60 : 29,161.56 = 11,700.88 : x
  2. Step 2: Convert to fraction form
    21,133.60/29,161.56 = 11,700.88/x
  3. Step 3: Cross multiply
    21,133.60x = 29,161.56 × 11,700.88
  4. Step 4: Simplify right side
    21,133.60x = 341,215,914.17
  5. Step 5: Solve for x
    x = 341,215,914.17/21,133.60
  6. Step 6: Final answer
    x = 16,145.66

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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.