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Finding the Fourth Proportional to 19,661.64, 27,130 and 11,276.52

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Solution

The fourth proportional to 19,661.64, 27,130 and 11,276.52 is: 15,559.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.64 : 27,130 = 11,276.52 : x
  2. Step 2: Convert to fraction form
    19,661.64/27,130 = 11,276.52/x
  3. Step 3: Cross multiply
    19,661.64x = 27,130 × 11,276.52
  4. Step 4: Simplify right side
    19,661.64x = 305,931,987.60
  5. Step 5: Solve for x
    x = 305,931,987.60/19,661.64
  6. Step 6: Final answer
    x = 15,559.84

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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.