Home / 9,381.25-12,945-5,403.66

Finding the Fourth Proportional to 9,381.25, 12,945 and 5,403.66

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Solution

The fourth proportional to 9,381.25, 12,945 and 5,403.66 is: 7,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,381.25 : 12,945 = 5,403.66 : x
  2. Step 2: Convert to fraction form
    9,381.25/12,945 = 5,403.66/x
  3. Step 3: Cross multiply
    9,381.25x = 12,945 × 5,403.66
  4. Step 4: Simplify right side
    9,381.25x = 69,950,378.70
  5. Step 5: Solve for x
    x = 69,950,378.70/9,381.25
  6. Step 6: Final answer
    x = 7,456.40

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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.