Home / 30,486.48-42,067.50-18,387.56

Finding the Fourth Proportional to 30,486.48, 42,067.50 and 18,387.56

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Solution

The fourth proportional to 30,486.48, 42,067.50 and 18,387.56 is: 25,372.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,486.48 : 42,067.50 = 18,387.56 : x
  2. Step 2: Convert to fraction form
    30,486.48/42,067.50 = 18,387.56/x
  3. Step 3: Cross multiply
    30,486.48x = 42,067.50 × 18,387.56
  4. Step 4: Simplify right side
    30,486.48x = 773,518,680.30
  5. Step 5: Solve for x
    x = 773,518,680.30/30,486.48
  6. Step 6: Final answer
    x = 25,372.52

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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.