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Finding the Fourth Proportional to 18,750.60, 28,129.14 and 7,663.32

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Solution

The fourth proportional to 18,750.60, 28,129.14 and 7,663.32 is: 11,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.60 : 28,129.14 = 7,663.32 : x
  2. Step 2: Convert to fraction form
    18,750.60/28,129.14 = 7,663.32/x
  3. Step 3: Cross multiply
    18,750.60x = 28,129.14 × 7,663.32
  4. Step 4: Simplify right side
    18,750.60x = 215,562,601.14
  5. Step 5: Solve for x
    x = 215,562,601.14/18,750.60
  6. Step 6: Final answer
    x = 11,496.30

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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.