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Finding the Fourth Proportional to 13,101.70, 19,652.55 and 11,805.70

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Solution

The fourth proportional to 13,101.70, 19,652.55 and 11,805.70 is: 17,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.70 : 19,652.55 = 11,805.70 : x
  2. Step 2: Convert to fraction form
    13,101.70/19,652.55 = 11,805.70/x
  3. Step 3: Cross multiply
    13,101.70x = 19,652.55 × 11,805.70
  4. Step 4: Simplify right side
    13,101.70x = 232,012,109.54
  5. Step 5: Solve for x
    x = 232,012,109.54/13,101.70
  6. Step 6: Final answer
    x = 17,708.55

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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.