Home / 30,690.18-42,351.72-18,753.48

Finding the Fourth Proportional to 30,690.18, 42,351.72 and 18,753.48

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Solution

The fourth proportional to 30,690.18, 42,351.72 and 18,753.48 is: 25,879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.18 : 42,351.72 = 18,753.48 : x
  2. Step 2: Convert to fraction form
    30,690.18/42,351.72 = 18,753.48/x
  3. Step 3: Cross multiply
    30,690.18x = 42,351.72 × 18,753.48
  4. Step 4: Simplify right side
    30,690.18x = 794,242,133.99
  5. Step 5: Solve for x
    x = 794,242,133.99/30,690.18
  6. Step 6: Final answer
    x = 25,879.36

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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.