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Finding the Fourth Proportional to 18,980.19, 26,190.41 and 11,426.40

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Solution

The fourth proportional to 18,980.19, 26,190.41 and 11,426.40 is: 15,767.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.19 : 26,190.41 = 11,426.40 : x
  2. Step 2: Convert to fraction form
    18,980.19/26,190.41 = 11,426.40/x
  3. Step 3: Cross multiply
    18,980.19x = 26,190.41 × 11,426.40
  4. Step 4: Simplify right side
    18,980.19x = 299,262,043.69
  5. Step 5: Solve for x
    x = 299,262,043.69/18,980.19
  6. Step 6: Final answer
    x = 15,767.07

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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.