Home / 12,956.78-19,430.28-4,189.34

Finding the Fourth Proportional to 12,956.78, 19,430.28 and 4,189.34

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Solution

The fourth proportional to 12,956.78, 19,430.28 and 4,189.34 is: 6,282.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956.78 : 19,430.28 = 4,189.34 : x
  2. Step 2: Convert to fraction form
    12,956.78/19,430.28 = 4,189.34/x
  3. Step 3: Cross multiply
    12,956.78x = 19,430.28 × 4,189.34
  4. Step 4: Simplify right side
    12,956.78x = 81,399,952.06
  5. Step 5: Solve for x
    x = 81,399,952.06/12,956.78
  6. Step 6: Final answer
    x = 6,282.42

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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.