Home / 21,438.66-29,585.30-12,007.28

Finding the Fourth Proportional to 21,438.66, 29,585.30 and 12,007.28

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Solution

The fourth proportional to 21,438.66, 29,585.30 and 12,007.28 is: 16,570.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.66 : 29,585.30 = 12,007.28 : x
  2. Step 2: Convert to fraction form
    21,438.66/29,585.30 = 12,007.28/x
  3. Step 3: Cross multiply
    21,438.66x = 29,585.30 × 12,007.28
  4. Step 4: Simplify right side
    21,438.66x = 355,238,980.98
  5. Step 5: Solve for x
    x = 355,238,980.98/21,438.66
  6. Step 6: Final answer
    x = 16,570.02

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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.