Home / 10,919.79-16,376.85-3,126.78

Finding the Fourth Proportional to 10,919.79, 16,376.85 and 3,126.78

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Solution

The fourth proportional to 10,919.79, 16,376.85 and 3,126.78 is: 4,689.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.79 : 16,376.85 = 3,126.78 : x
  2. Step 2: Convert to fraction form
    10,919.79/16,376.85 = 3,126.78/x
  3. Step 3: Cross multiply
    10,919.79x = 16,376.85 × 3,126.78
  4. Step 4: Simplify right side
    10,919.79x = 51,206,807.04
  5. Step 5: Solve for x
    x = 51,206,807.04/10,919.79
  6. Step 6: Final answer
    x = 4,689.36

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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.