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Finding the Fourth Proportional to 18,246.16, 25,162.90 and 11,520.10

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Solution

The fourth proportional to 18,246.16, 25,162.90 and 11,520.10 is: 15,887.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,246.16 : 25,162.90 = 11,520.10 : x
  2. Step 2: Convert to fraction form
    18,246.16/25,162.90 = 11,520.10/x
  3. Step 3: Cross multiply
    18,246.16x = 25,162.90 × 11,520.10
  4. Step 4: Simplify right side
    18,246.16x = 289,879,124.29
  5. Step 5: Solve for x
    x = 289,879,124.29/18,246.16
  6. Step 6: Final answer
    x = 15,887.13

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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.