Home / 30,986.08-42,755.20-18,238.24

Finding the Fourth Proportional to 30,986.08, 42,755.20 and 18,238.24

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Solution

The fourth proportional to 30,986.08, 42,755.20 and 18,238.24 is: 25,165.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.08 : 42,755.20 = 18,238.24 : x
  2. Step 2: Convert to fraction form
    30,986.08/42,755.20 = 18,238.24/x
  3. Step 3: Cross multiply
    30,986.08x = 42,755.20 × 18,238.24
  4. Step 4: Simplify right side
    30,986.08x = 779,779,598.85
  5. Step 5: Solve for x
    x = 779,779,598.85/30,986.08
  6. Step 6: Final answer
    x = 25,165.48

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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.