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Finding the Fourth Proportional to 13,979, 19,291.02 and 7,691.60

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Solution

The fourth proportional to 13,979, 19,291.02 and 7,691.60 is: 10,614.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979 : 19,291.02 = 7,691.60 : x
  2. Step 2: Convert to fraction form
    13,979/19,291.02 = 7,691.60/x
  3. Step 3: Cross multiply
    13,979x = 19,291.02 × 7,691.60
  4. Step 4: Simplify right side
    13,979x = 148,378,809.43
  5. Step 5: Solve for x
    x = 148,378,809.43/13,979
  6. Step 6: Final answer
    x = 10,614.41

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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.