Home / 21,344.72-29,455.68-11,913.28

Finding the Fourth Proportional to 21,344.72, 29,455.68 and 11,913.28

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Solution

The fourth proportional to 21,344.72, 29,455.68 and 11,913.28 is: 16,440.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,344.72 : 29,455.68 = 11,913.28 : x
  2. Step 2: Convert to fraction form
    21,344.72/29,455.68 = 11,913.28/x
  3. Step 3: Cross multiply
    21,344.72x = 29,455.68 × 11,913.28
  4. Step 4: Simplify right side
    21,344.72x = 350,913,763.43
  5. Step 5: Solve for x
    x = 350,913,763.43/21,344.72
  6. Step 6: Final answer
    x = 16,440.31

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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.