Home / 28,615.12-42,930.30-11,969.56

Finding the Fourth Proportional to 28,615.12, 42,930.30 and 11,969.56

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Solution

The fourth proportional to 28,615.12, 42,930.30 and 11,969.56 is: 17,957.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.12 : 42,930.30 = 11,969.56 : x
  2. Step 2: Convert to fraction form
    28,615.12/42,930.30 = 11,969.56/x
  3. Step 3: Cross multiply
    28,615.12x = 42,930.30 × 11,969.56
  4. Step 4: Simplify right side
    28,615.12x = 513,856,801.67
  5. Step 5: Solve for x
    x = 513,856,801.67/28,615.12
  6. Step 6: Final answer
    x = 17,957.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.