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Finding the Fourth Proportional to 12,008.81, 18,012.83 and 5,434.99

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Solution

The fourth proportional to 12,008.81, 18,012.83 and 5,434.99 is: 8,152.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.81 : 18,012.83 = 5,434.99 : x
  2. Step 2: Convert to fraction form
    12,008.81/18,012.83 = 5,434.99/x
  3. Step 3: Cross multiply
    12,008.81x = 18,012.83 × 5,434.99
  4. Step 4: Simplify right side
    12,008.81x = 97,899,550.92
  5. Step 5: Solve for x
    x = 97,899,550.92/12,008.81
  6. Step 6: Final answer
    x = 8,152.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.