Home / 30,966.82-42,735.12-16,820.56

Finding the Fourth Proportional to 30,966.82, 42,735.12 and 16,820.56

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Solution

The fourth proportional to 30,966.82, 42,735.12 and 16,820.56 is: 23,212.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.82 : 42,735.12 = 16,820.56 : x
  2. Step 2: Convert to fraction form
    30,966.82/42,735.12 = 16,820.56/x
  3. Step 3: Cross multiply
    30,966.82x = 42,735.12 × 16,820.56
  4. Step 4: Simplify right side
    30,966.82x = 718,828,650.07
  5. Step 5: Solve for x
    x = 718,828,650.07/30,966.82
  6. Step 6: Final answer
    x = 23,212.87

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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.