Home / 21,982.72-30,337.64-12,419.29

Finding the Fourth Proportional to 21,982.72, 30,337.64 and 12,419.29

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Solution

The fourth proportional to 21,982.72, 30,337.64 and 12,419.29 is: 17,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.72 : 30,337.64 = 12,419.29 : x
  2. Step 2: Convert to fraction form
    21,982.72/30,337.64 = 12,419.29/x
  3. Step 3: Cross multiply
    21,982.72x = 30,337.64 × 12,419.29
  4. Step 4: Simplify right side
    21,982.72x = 376,771,735.29
  5. Step 5: Solve for x
    x = 376,771,735.29/21,982.72
  6. Step 6: Final answer
    x = 17,139.45

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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.