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Finding the Fourth Proportional to 17,930.40, 26,895.60 and 12,976.80

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Solution

The fourth proportional to 17,930.40, 26,895.60 and 12,976.80 is: 19,465.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,930.40 : 26,895.60 = 12,976.80 : x
  2. Step 2: Convert to fraction form
    17,930.40/26,895.60 = 12,976.80/x
  3. Step 3: Cross multiply
    17,930.40x = 26,895.60 × 12,976.80
  4. Step 4: Simplify right side
    17,930.40x = 349,018,822.08
  5. Step 5: Solve for x
    x = 349,018,822.08/17,930.40
  6. Step 6: Final answer
    x = 19,465.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.