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Finding the Fourth Proportional to 19,290.25, 26,619.28 and 10,790.90

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Solution

The fourth proportional to 19,290.25, 26,619.28 and 10,790.90 is: 14,890.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,290.25 : 26,619.28 = 10,790.90 : x
  2. Step 2: Convert to fraction form
    19,290.25/26,619.28 = 10,790.90/x
  3. Step 3: Cross multiply
    19,290.25x = 26,619.28 × 10,790.90
  4. Step 4: Simplify right side
    19,290.25x = 287,245,988.55
  5. Step 5: Solve for x
    x = 287,245,988.55/19,290.25
  6. Step 6: Final answer
    x = 14,890.73

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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.