Home / 21,984.40-30,338.42-11,913.12

Finding the Fourth Proportional to 21,984.40, 30,338.42 and 11,913.12

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Solution

The fourth proportional to 21,984.40, 30,338.42 and 11,913.12 is: 16,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.40 : 30,338.42 = 11,913.12 : x
  2. Step 2: Convert to fraction form
    21,984.40/30,338.42 = 11,913.12/x
  3. Step 3: Cross multiply
    21,984.40x = 30,338.42 × 11,913.12
  4. Step 4: Simplify right side
    21,984.40x = 361,425,238.07
  5. Step 5: Solve for x
    x = 361,425,238.07/21,984.40
  6. Step 6: Final answer
    x = 16,440.08

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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.