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Finding the Fourth Proportional to 8,920.80, 12,313.32 and 6,268.92

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Solution

The fourth proportional to 8,920.80, 12,313.32 and 6,268.92 is: 8,652.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.80 : 12,313.32 = 6,268.92 : x
  2. Step 2: Convert to fraction form
    8,920.80/12,313.32 = 6,268.92/x
  3. Step 3: Cross multiply
    8,920.80x = 12,313.32 × 6,268.92
  4. Step 4: Simplify right side
    8,920.80x = 77,191,218.01
  5. Step 5: Solve for x
    x = 77,191,218.01/8,920.80
  6. Step 6: Final answer
    x = 8,652.95

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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.