Home / 30,579.27-42,199.32-18,642.60

Finding the Fourth Proportional to 30,579.27, 42,199.32 and 18,642.60

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Solution

The fourth proportional to 30,579.27, 42,199.32 and 18,642.60 is: 25,726.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.27 : 42,199.32 = 18,642.60 : x
  2. Step 2: Convert to fraction form
    30,579.27/42,199.32 = 18,642.60/x
  3. Step 3: Cross multiply
    30,579.27x = 42,199.32 × 18,642.60
  4. Step 4: Simplify right side
    30,579.27x = 786,705,043.03
  5. Step 5: Solve for x
    x = 786,705,043.03/30,579.27
  6. Step 6: Final answer
    x = 25,726.74

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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.