Home / 8,920.92-12,311.31-5,384.07

Finding the Fourth Proportional to 8,920.92, 12,311.31 and 5,384.07

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Solution

The fourth proportional to 8,920.92, 12,311.31 and 5,384.07 is: 7,430.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.92 : 12,311.31 = 5,384.07 : x
  2. Step 2: Convert to fraction form
    8,920.92/12,311.31 = 5,384.07/x
  3. Step 3: Cross multiply
    8,920.92x = 12,311.31 × 5,384.07
  4. Step 4: Simplify right side
    8,920.92x = 66,284,954.83
  5. Step 5: Solve for x
    x = 66,284,954.83/8,920.92
  6. Step 6: Final answer
    x = 7,430.28

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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.