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Finding the Fourth Proportional to 18,919.19, 26,107.76 and 10,535.69

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Solution

The fourth proportional to 18,919.19, 26,107.76 and 10,535.69 is: 14,538.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.19 : 26,107.76 = 10,535.69 : x
  2. Step 2: Convert to fraction form
    18,919.19/26,107.76 = 10,535.69/x
  3. Step 3: Cross multiply
    18,919.19x = 26,107.76 × 10,535.69
  4. Step 4: Simplify right side
    18,919.19x = 275,063,082.74
  5. Step 5: Solve for x
    x = 275,063,082.74/18,919.19
  6. Step 6: Final answer
    x = 14,538.84

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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.