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Finding the Fourth Proportional to 13,381.67, 18,465.98 and 7,412.99

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Solution

The fourth proportional to 13,381.67, 18,465.98 and 7,412.99 is: 10,229.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.67 : 18,465.98 = 7,412.99 : x
  2. Step 2: Convert to fraction form
    13,381.67/18,465.98 = 7,412.99/x
  3. Step 3: Cross multiply
    13,381.67x = 18,465.98 × 7,412.99
  4. Step 4: Simplify right side
    13,381.67x = 136,887,995.69
  5. Step 5: Solve for x
    x = 136,887,995.69/13,381.67
  6. Step 6: Final answer
    x = 10,229.52

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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.