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Finding the Fourth Proportional to 9,688.64, 13,369.92 and 5,709.92

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Solution

The fourth proportional to 9,688.64, 13,369.92 and 5,709.92 is: 7,879.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,688.64 : 13,369.92 = 5,709.92 : x
  2. Step 2: Convert to fraction form
    9,688.64/13,369.92 = 5,709.92/x
  3. Step 3: Cross multiply
    9,688.64x = 13,369.92 × 5,709.92
  4. Step 4: Simplify right side
    9,688.64x = 76,341,173.61
  5. Step 5: Solve for x
    x = 76,341,173.61/9,688.64
  6. Step 6: Final answer
    x = 7,879.45

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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.