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Finding the Fourth Proportional to 19,795, 27,312.72 and 12,139.92

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Solution

The fourth proportional to 19,795, 27,312.72 and 12,139.92 is: 16,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,795 : 27,312.72 = 12,139.92 : x
  2. Step 2: Convert to fraction form
    19,795/27,312.72 = 12,139.92/x
  3. Step 3: Cross multiply
    19,795x = 27,312.72 × 12,139.92
  4. Step 4: Simplify right side
    19,795x = 331,574,235.78
  5. Step 5: Solve for x
    x = 331,574,235.78/19,795
  6. Step 6: Final answer
    x = 16,750.40

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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.