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Finding the Fourth Proportional to 18,890.50, 26,068.90 and 10,506.82

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Solution

The fourth proportional to 18,890.50, 26,068.90 and 10,506.82 is: 14,499.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.50 : 26,068.90 = 10,506.82 : x
  2. Step 2: Convert to fraction form
    18,890.50/26,068.90 = 10,506.82/x
  3. Step 3: Cross multiply
    18,890.50x = 26,068.90 × 10,506.82
  4. Step 4: Simplify right side
    18,890.50x = 273,901,239.90
  5. Step 5: Solve for x
    x = 273,901,239.90/18,890.50
  6. Step 6: Final answer
    x = 14,499.42

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1.5x scale

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.