Home / 30,805.30-42,504.78-18,055.90

Finding the Fourth Proportional to 30,805.30, 42,504.78 and 18,055.90

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Solution

The fourth proportional to 30,805.30, 42,504.78 and 18,055.90 is: 24,913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,805.30 : 42,504.78 = 18,055.90 : x
  2. Step 2: Convert to fraction form
    30,805.30/42,504.78 = 18,055.90/x
  3. Step 3: Cross multiply
    30,805.30x = 42,504.78 × 18,055.90
  4. Step 4: Simplify right side
    30,805.30x = 767,462,057.20
  5. Step 5: Solve for x
    x = 767,462,057.20/30,805.30
  6. Step 6: Final answer
    x = 24,913.31

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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.