Home / 30,118.31-45,151.99-19,000.55

Finding the Fourth Proportional to 30,118.31, 45,151.99 and 19,000.55

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Solution

The fourth proportional to 30,118.31, 45,151.99 and 19,000.55 is: 28,484.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,118.31 : 45,151.99 = 19,000.55 : x
  2. Step 2: Convert to fraction form
    30,118.31/45,151.99 = 19,000.55/x
  3. Step 3: Cross multiply
    30,118.31x = 45,151.99 × 19,000.55
  4. Step 4: Simplify right side
    30,118.31x = 857,912,643.59
  5. Step 5: Solve for x
    x = 857,912,643.59/30,118.31
  6. Step 6: Final answer
    x = 28,484.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.