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Finding the Fourth Proportional to 19,687.55, 29,461.95 and 12,295.49

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Solution

The fourth proportional to 19,687.55, 29,461.95 and 12,295.49 is: 18,399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,687.55 : 29,461.95 = 12,295.49 : x
  2. Step 2: Convert to fraction form
    19,687.55/29,461.95 = 12,295.49/x
  3. Step 3: Cross multiply
    19,687.55x = 29,461.95 × 12,295.49
  4. Step 4: Simplify right side
    19,687.55x = 362,248,964.30
  5. Step 5: Solve for x
    x = 362,248,964.30/19,687.55
  6. Step 6: Final answer
    x = 18,399.91

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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.