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Finding the Fourth Proportional to 12,660.98, 18,991.40 and 5,164.52

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Solution

The fourth proportional to 12,660.98, 18,991.40 and 5,164.52 is: 7,746.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.98 : 18,991.40 = 5,164.52 : x
  2. Step 2: Convert to fraction form
    12,660.98/18,991.40 = 5,164.52/x
  3. Step 3: Cross multiply
    12,660.98x = 18,991.40 × 5,164.52
  4. Step 4: Simplify right side
    12,660.98x = 98,081,465.13
  5. Step 5: Solve for x
    x = 98,081,465.13/12,660.98
  6. Step 6: Final answer
    x = 7,746.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.