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Finding the Fourth Proportional to 9,720, 13,416.03 and 5,530.68

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Solution

The fourth proportional to 9,720, 13,416.03 and 5,530.68 is: 7,633.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,720 : 13,416.03 = 5,530.68 : x
  2. Step 2: Convert to fraction form
    9,720/13,416.03 = 5,530.68/x
  3. Step 3: Cross multiply
    9,720x = 13,416.03 × 5,530.68
  4. Step 4: Simplify right side
    9,720x = 74,199,768.80
  5. Step 5: Solve for x
    x = 74,199,768.80/9,720
  6. Step 6: Final answer
    x = 7,633.72

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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.