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Finding the Fourth Proportional to 19,999.60, 29,922.60 and 13,087.60

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Solution

The fourth proportional to 19,999.60, 29,922.60 and 13,087.60 is: 19,581.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.60 : 29,922.60 = 13,087.60 : x
  2. Step 2: Convert to fraction form
    19,999.60/29,922.60 = 13,087.60/x
  3. Step 3: Cross multiply
    19,999.60x = 29,922.60 × 13,087.60
  4. Step 4: Simplify right side
    19,999.60x = 391,615,019.76
  5. Step 5: Solve for x
    x = 391,615,019.76/19,999.60
  6. Step 6: Final answer
    x = 19,581.14

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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.