Home / 11,695.96-16,140.16-6,390.81

Finding the Fourth Proportional to 11,695.96, 16,140.16 and 6,390.81

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Solution

The fourth proportional to 11,695.96, 16,140.16 and 6,390.81 is: 8,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,695.96 : 16,140.16 = 6,390.81 : x
  2. Step 2: Convert to fraction form
    11,695.96/16,140.16 = 6,390.81/x
  3. Step 3: Cross multiply
    11,695.96x = 16,140.16 × 6,390.81
  4. Step 4: Simplify right side
    11,695.96x = 103,148,703.92
  5. Step 5: Solve for x
    x = 103,148,703.92/11,695.96
  6. Step 6: Final answer
    x = 8,819.17

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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.