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Finding the Fourth Proportional to 28,361, 42,467.18 and 19,995.74

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Solution

The fourth proportional to 28,361, 42,467.18 and 19,995.74 is: 29,941.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361 : 42,467.18 = 19,995.74 : x
  2. Step 2: Convert to fraction form
    28,361/42,467.18 = 19,995.74/x
  3. Step 3: Cross multiply
    28,361x = 42,467.18 × 19,995.74
  4. Step 4: Simplify right side
    28,361x = 849,162,689.81
  5. Step 5: Solve for x
    x = 849,162,689.81/28,361
  6. Step 6: Final answer
    x = 29,941.21

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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.