Home / 11,288.71-16,931.85-3,390.40

Finding the Fourth Proportional to 11,288.71, 16,931.85 and 3,390.40

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Solution

The fourth proportional to 11,288.71, 16,931.85 and 3,390.40 is: 5,085.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,288.71 : 16,931.85 = 3,390.40 : x
  2. Step 2: Convert to fraction form
    11,288.71/16,931.85 = 3,390.40/x
  3. Step 3: Cross multiply
    11,288.71x = 16,931.85 × 3,390.40
  4. Step 4: Simplify right side
    11,288.71x = 57,405,744.24
  5. Step 5: Solve for x
    x = 57,405,744.24/11,288.71
  6. Step 6: Final answer
    x = 5,085.24

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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.