Home / 30,853.98-42,579.27-18,923.90

Finding the Fourth Proportional to 30,853.98, 42,579.27 and 18,923.90

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Solution

The fourth proportional to 30,853.98, 42,579.27 and 18,923.90 is: 26,115.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,853.98 : 42,579.27 = 18,923.90 : x
  2. Step 2: Convert to fraction form
    30,853.98/42,579.27 = 18,923.90/x
  3. Step 3: Cross multiply
    30,853.98x = 42,579.27 × 18,923.90
  4. Step 4: Simplify right side
    30,853.98x = 805,765,634.66
  5. Step 5: Solve for x
    x = 805,765,634.66/30,853.98
  6. Step 6: Final answer
    x = 26,115.45

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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.