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Finding the Fourth Proportional to 13,365, 18,443.40 and 7,396.74

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Solution

The fourth proportional to 13,365, 18,443.40 and 7,396.74 is: 10,207.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,365 : 18,443.40 = 7,396.74 : x
  2. Step 2: Convert to fraction form
    13,365/18,443.40 = 7,396.74/x
  3. Step 3: Cross multiply
    13,365x = 18,443.40 × 7,396.74
  4. Step 4: Simplify right side
    13,365x = 136,421,034.52
  5. Step 5: Solve for x
    x = 136,421,034.52/13,365
  6. Step 6: Final answer
    x = 10,207.34

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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.