Home / 30,579.20-42,203.20-18,005.12

Finding the Fourth Proportional to 30,579.20, 42,203.20 and 18,005.12

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Solution

The fourth proportional to 30,579.20, 42,203.20 and 18,005.12 is: 24,849.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.20 : 42,203.20 = 18,005.12 : x
  2. Step 2: Convert to fraction form
    30,579.20/42,203.20 = 18,005.12/x
  3. Step 3: Cross multiply
    30,579.20x = 42,203.20 × 18,005.12
  4. Step 4: Simplify right side
    30,579.20x = 759,873,680.38
  5. Step 5: Solve for x
    x = 759,873,680.38/30,579.20
  6. Step 6: Final answer
    x = 24,849.36

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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.