Home / 30,894.88-42,635.12-18,145.12

Finding the Fourth Proportional to 30,894.88, 42,635.12 and 18,145.12

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Solution

The fourth proportional to 30,894.88, 42,635.12 and 18,145.12 is: 25,040.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,894.88 : 42,635.12 = 18,145.12 : x
  2. Step 2: Convert to fraction form
    30,894.88/42,635.12 = 18,145.12/x
  3. Step 3: Cross multiply
    30,894.88x = 42,635.12 × 18,145.12
  4. Step 4: Simplify right side
    30,894.88x = 773,619,368.61
  5. Step 5: Solve for x
    x = 773,619,368.61/30,894.88
  6. Step 6: Final answer
    x = 25,040.37

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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.