Home / 21,438.78-29,585.92-12,007.32

Finding the Fourth Proportional to 21,438.78, 29,585.92 and 12,007.32

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Solution

The fourth proportional to 21,438.78, 29,585.92 and 12,007.32 is: 16,570.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.78 : 29,585.92 = 12,007.32 : x
  2. Step 2: Convert to fraction form
    21,438.78/29,585.92 = 12,007.32/x
  3. Step 3: Cross multiply
    21,438.78x = 29,585.92 × 12,007.32
  4. Step 4: Simplify right side
    21,438.78x = 355,247,608.93
  5. Step 5: Solve for x
    x = 355,247,608.93/21,438.78
  6. Step 6: Final answer
    x = 16,570.33

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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.