Home / 12,278.40-16,923.92-8,688.72

Finding the Fourth Proportional to 12,278.40, 16,923.92 and 8,688.72

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Solution

The fourth proportional to 12,278.40, 16,923.92 and 8,688.72 is: 11,976.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.40 : 16,923.92 = 8,688.72 : x
  2. Step 2: Convert to fraction form
    12,278.40/16,923.92 = 8,688.72/x
  3. Step 3: Cross multiply
    12,278.40x = 16,923.92 × 8,688.72
  4. Step 4: Simplify right side
    12,278.40x = 147,047,202.18
  5. Step 5: Solve for x
    x = 147,047,202.18/12,278.40
  6. Step 6: Final answer
    x = 11,976.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.