Home / 30,923.28-42,672.96-18,987.12

Finding the Fourth Proportional to 30,923.28, 42,672.96 and 18,987.12

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Solution

The fourth proportional to 30,923.28, 42,672.96 and 18,987.12 is: 26,201.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,923.28 : 42,672.96 = 18,987.12 : x
  2. Step 2: Convert to fraction form
    30,923.28/42,672.96 = 18,987.12/x
  3. Step 3: Cross multiply
    30,923.28x = 42,672.96 × 18,987.12
  4. Step 4: Simplify right side
    30,923.28x = 810,236,612.28
  5. Step 5: Solve for x
    x = 810,236,612.28/30,923.28
  6. Step 6: Final answer
    x = 26,201.51

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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.