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Finding the Fourth Proportional to 9,881.40, 13,636.34 and 7,365.72

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Solution

The fourth proportional to 9,881.40, 13,636.34 and 7,365.72 is: 10,164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,881.40 : 13,636.34 = 7,365.72 : x
  2. Step 2: Convert to fraction form
    9,881.40/13,636.34 = 7,365.72/x
  3. Step 3: Cross multiply
    9,881.40x = 13,636.34 × 7,365.72
  4. Step 4: Simplify right side
    9,881.40x = 100,441,462.26
  5. Step 5: Solve for x
    x = 100,441,462.26/9,881.40
  6. Step 6: Final answer
    x = 10,164.70

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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.