Home / 8,920.85-12,313.31-5,384.28

Finding the Fourth Proportional to 8,920.85, 12,313.31 and 5,384.28

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Solution

The fourth proportional to 8,920.85, 12,313.31 and 5,384.28 is: 7,431.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.85 : 12,313.31 = 5,384.28 : x
  2. Step 2: Convert to fraction form
    8,920.85/12,313.31 = 5,384.28/x
  3. Step 3: Cross multiply
    8,920.85x = 12,313.31 × 5,384.28
  4. Step 4: Simplify right side
    8,920.85x = 66,298,328.02
  5. Step 5: Solve for x
    x = 66,298,328.02/8,920.85
  6. Step 6: Final answer
    x = 7,431.84

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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.