Home / 9,707.20-13,408.32-8,143.36

Finding the Fourth Proportional to 9,707.20, 13,408.32 and 8,143.36

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Solution

The fourth proportional to 9,707.20, 13,408.32 and 8,143.36 is: 11,248.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,707.20 : 13,408.32 = 8,143.36 : x
  2. Step 2: Convert to fraction form
    9,707.20/13,408.32 = 8,143.36/x
  3. Step 3: Cross multiply
    9,707.20x = 13,408.32 × 8,143.36
  4. Step 4: Simplify right side
    9,707.20x = 109,188,776.76
  5. Step 5: Solve for x
    x = 109,188,776.76/9,707.20
  6. Step 6: Final answer
    x = 11,248.23

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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.