Home / 30,540.12-42,148.08-17,111.30

Finding the Fourth Proportional to 30,540.12, 42,148.08 and 17,111.30

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Solution

The fourth proportional to 30,540.12, 42,148.08 and 17,111.30 is: 23,615.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,540.12 : 42,148.08 = 17,111.30 : x
  2. Step 2: Convert to fraction form
    30,540.12/42,148.08 = 17,111.30/x
  3. Step 3: Cross multiply
    30,540.12x = 42,148.08 × 17,111.30
  4. Step 4: Simplify right side
    30,540.12x = 721,208,230.56
  5. Step 5: Solve for x
    x = 721,208,230.56/30,540.12
  6. Step 6: Final answer
    x = 23,615.11

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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.