Home / 30,515.90-42,112.96-17,087.72

Finding the Fourth Proportional to 30,515.90, 42,112.96 and 17,087.72

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Solution

The fourth proportional to 30,515.90, 42,112.96 and 17,087.72 is: 23,581.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,515.90 : 42,112.96 = 17,087.72 : x
  2. Step 2: Convert to fraction form
    30,515.90/42,112.96 = 17,087.72/x
  3. Step 3: Cross multiply
    30,515.90x = 42,112.96 × 17,087.72
  4. Step 4: Simplify right side
    30,515.90x = 719,614,468.85
  5. Step 5: Solve for x
    x = 719,614,468.85/30,515.90
  6. Step 6: Final answer
    x = 23,581.62

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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.