Home / 30,839.61-42,559.69-18,900.64

Finding the Fourth Proportional to 30,839.61, 42,559.69 and 18,900.64

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Solution

The fourth proportional to 30,839.61, 42,559.69 and 18,900.64 is: 26,083.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,839.61 : 42,559.69 = 18,900.64 : x
  2. Step 2: Convert to fraction form
    30,839.61/42,559.69 = 18,900.64/x
  3. Step 3: Cross multiply
    30,839.61x = 42,559.69 × 18,900.64
  4. Step 4: Simplify right side
    30,839.61x = 804,405,379.20
  5. Step 5: Solve for x
    x = 804,405,379.20/30,839.61
  6. Step 6: Final answer
    x = 26,083.51

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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.