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Finding the Fourth Proportional to 13,369.67, 18,449.88 and 7,400.99

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Solution

The fourth proportional to 13,369.67, 18,449.88 and 7,400.99 is: 10,213.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,369.67 : 18,449.88 = 7,400.99 : x
  2. Step 2: Convert to fraction form
    13,369.67/18,449.88 = 7,400.99/x
  3. Step 3: Cross multiply
    13,369.67x = 18,449.88 × 7,400.99
  4. Step 4: Simplify right side
    13,369.67x = 136,547,377.38
  5. Step 5: Solve for x
    x = 136,547,377.38/13,369.67
  6. Step 6: Final answer
    x = 10,213.22

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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.