Home / 12,951.28-19,430.56-4,186.92

Finding the Fourth Proportional to 12,951.28, 19,430.56 and 4,186.92

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Solution

The fourth proportional to 12,951.28, 19,430.56 and 4,186.92 is: 6,281.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,951.28 : 19,430.56 = 4,186.92 : x
  2. Step 2: Convert to fraction form
    12,951.28/19,430.56 = 4,186.92/x
  3. Step 3: Cross multiply
    12,951.28x = 19,430.56 × 4,186.92
  4. Step 4: Simplify right side
    12,951.28x = 81,354,200.28
  5. Step 5: Solve for x
    x = 81,354,200.28/12,951.28
  6. Step 6: Final answer
    x = 6,281.56

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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.