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Finding the Fourth Proportional to 18,491.92, 25,515.90 and 10,534.30

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Solution

The fourth proportional to 18,491.92, 25,515.90 and 10,534.30 is: 14,535.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.92 : 25,515.90 = 10,534.30 : x
  2. Step 2: Convert to fraction form
    18,491.92/25,515.90 = 10,534.30/x
  3. Step 3: Cross multiply
    18,491.92x = 25,515.90 × 10,534.30
  4. Step 4: Simplify right side
    18,491.92x = 268,792,145.37
  5. Step 5: Solve for x
    x = 268,792,145.37/18,491.92
  6. Step 6: Final answer
    x = 14,535.65

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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.