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Finding the Fourth Proportional to 12,898.66, 17,800.35 and 7,520.95

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Solution

The fourth proportional to 12,898.66, 17,800.35 and 7,520.95 is: 10,379.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,898.66 : 17,800.35 = 7,520.95 : x
  2. Step 2: Convert to fraction form
    12,898.66/17,800.35 = 7,520.95/x
  3. Step 3: Cross multiply
    12,898.66x = 17,800.35 × 7,520.95
  4. Step 4: Simplify right side
    12,898.66x = 133,875,586.83
  5. Step 5: Solve for x
    x = 133,875,586.83/12,898.66
  6. Step 6: Final answer
    x = 10,379.03

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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.