Home / 21,145.28-29,178.36-11,712.08

Finding the Fourth Proportional to 21,145.28, 29,178.36 and 11,712.08

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Solution

The fourth proportional to 21,145.28, 29,178.36 and 11,712.08 is: 16,161.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.28 : 29,178.36 = 11,712.08 : x
  2. Step 2: Convert to fraction form
    21,145.28/29,178.36 = 11,712.08/x
  3. Step 3: Cross multiply
    21,145.28x = 29,178.36 × 11,712.08
  4. Step 4: Simplify right side
    21,145.28x = 341,739,286.59
  5. Step 5: Solve for x
    x = 341,739,286.59/21,145.28
  6. Step 6: Final answer
    x = 16,161.49

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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.