Home / 12,951.36-19,430.28-5,160.78

Finding the Fourth Proportional to 12,951.36, 19,430.28 and 5,160.78

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Solution

The fourth proportional to 12,951.36, 19,430.28 and 5,160.78 is: 7,742.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,951.36 : 19,430.28 = 5,160.78 : x
  2. Step 2: Convert to fraction form
    12,951.36/19,430.28 = 5,160.78/x
  3. Step 3: Cross multiply
    12,951.36x = 19,430.28 × 5,160.78
  4. Step 4: Simplify right side
    12,951.36x = 100,275,400.42
  5. Step 5: Solve for x
    x = 100,275,400.42/12,951.36
  6. Step 6: Final answer
    x = 7,742.46

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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.