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Finding the Fourth Proportional to 18,505.86, 25,709.27 and 18,332.91

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Solution

The fourth proportional to 18,505.86, 25,709.27 and 18,332.91 is: 25,468.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.86 : 25,709.27 = 18,332.91 : x
  2. Step 2: Convert to fraction form
    18,505.86/25,709.27 = 18,332.91/x
  3. Step 3: Cross multiply
    18,505.86x = 25,709.27 × 18,332.91
  4. Step 4: Simplify right side
    18,505.86x = 471,325,641.41
  5. Step 5: Solve for x
    x = 471,325,641.41/18,505.86
  6. Step 6: Final answer
    x = 25,468.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.