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Finding the Fourth Proportional to 18,811.98, 25,959.15 and 10,312.74

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Solution

The fourth proportional to 18,811.98, 25,959.15 and 10,312.74 is: 14,230.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.98 : 25,959.15 = 10,312.74 : x
  2. Step 2: Convert to fraction form
    18,811.98/25,959.15 = 10,312.74/x
  3. Step 3: Cross multiply
    18,811.98x = 25,959.15 × 10,312.74
  4. Step 4: Simplify right side
    18,811.98x = 267,709,964.57
  5. Step 5: Solve for x
    x = 267,709,964.57/18,811.98
  6. Step 6: Final answer
    x = 14,230.82

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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.