Home / 12,780.72-19,154.07-7,230.60

Finding the Fourth Proportional to 12,780.72, 19,154.07 and 7,230.60

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Solution

The fourth proportional to 12,780.72, 19,154.07 and 7,230.60 is: 10,836.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.72 : 19,154.07 = 7,230.60 : x
  2. Step 2: Convert to fraction form
    12,780.72/19,154.07 = 7,230.60/x
  3. Step 3: Cross multiply
    12,780.72x = 19,154.07 × 7,230.60
  4. Step 4: Simplify right side
    12,780.72x = 138,495,418.54
  5. Step 5: Solve for x
    x = 138,495,418.54/12,780.72
  6. Step 6: Final answer
    x = 10,836.28

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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.