Home / 30,999.20-42,779.07-18,252.94

Finding the Fourth Proportional to 30,999.20, 42,779.07 and 18,252.94

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Solution

The fourth proportional to 30,999.20, 42,779.07 and 18,252.94 is: 25,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.20 : 42,779.07 = 18,252.94 : x
  2. Step 2: Convert to fraction form
    30,999.20/42,779.07 = 18,252.94/x
  3. Step 3: Cross multiply
    30,999.20x = 42,779.07 × 18,252.94
  4. Step 4: Simplify right side
    30,999.20x = 780,843,622.57
  5. Step 5: Solve for x
    x = 780,843,622.57/30,999.20
  6. Step 6: Final answer
    x = 25,189.16

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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.