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Finding the Fourth Proportional to 19,097.70, 26,362.17 and 12,390.90

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Solution

The fourth proportional to 19,097.70, 26,362.17 and 12,390.90 is: 17,104.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,097.70 : 26,362.17 = 12,390.90 : x
  2. Step 2: Convert to fraction form
    19,097.70/26,362.17 = 12,390.90/x
  3. Step 3: Cross multiply
    19,097.70x = 26,362.17 × 12,390.90
  4. Step 4: Simplify right side
    19,097.70x = 326,651,012.25
  5. Step 5: Solve for x
    x = 326,651,012.25/19,097.70
  6. Step 6: Final answer
    x = 17,104.21

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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.