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Finding the Fourth Proportional to 9,839.60, 13,564.32 and 7,477.64

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Solution

The fourth proportional to 9,839.60, 13,564.32 and 7,477.64 is: 10,308.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,839.60 : 13,564.32 = 7,477.64 : x
  2. Step 2: Convert to fraction form
    9,839.60/13,564.32 = 7,477.64/x
  3. Step 3: Cross multiply
    9,839.60x = 13,564.32 × 7,477.64
  4. Step 4: Simplify right side
    9,839.60x = 101,429,101.80
  5. Step 5: Solve for x
    x = 101,429,101.80/9,839.60
  6. Step 6: Final answer
    x = 10,308.25

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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.