Home / 12,688.32-19,032.80-3,923.20

Finding the Fourth Proportional to 12,688.32, 19,032.80 and 3,923.20

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Solution

The fourth proportional to 12,688.32, 19,032.80 and 3,923.20 is: 5,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.32 : 19,032.80 = 3,923.20 : x
  2. Step 2: Convert to fraction form
    12,688.32/19,032.80 = 3,923.20/x
  3. Step 3: Cross multiply
    12,688.32x = 19,032.80 × 3,923.20
  4. Step 4: Simplify right side
    12,688.32x = 74,669,480.96
  5. Step 5: Solve for x
    x = 74,669,480.96/12,688.32
  6. Step 6: Final answer
    x = 5,884.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.