Home / 30,879.79-42,614.44-18,133.12

Finding the Fourth Proportional to 30,879.79, 42,614.44 and 18,133.12

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Solution

The fourth proportional to 30,879.79, 42,614.44 and 18,133.12 is: 25,023.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,879.79 : 42,614.44 = 18,133.12 : x
  2. Step 2: Convert to fraction form
    30,879.79/42,614.44 = 18,133.12/x
  3. Step 3: Cross multiply
    30,879.79x = 42,614.44 × 18,133.12
  4. Step 4: Simplify right side
    30,879.79x = 772,732,799.59
  5. Step 5: Solve for x
    x = 772,732,799.59/30,879.79
  6. Step 6: Final answer
    x = 25,023.90

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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.