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Finding the Fourth Proportional to 19,187.76, 28,785.96 and 7,504.32

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Solution

The fourth proportional to 19,187.76, 28,785.96 and 7,504.32 is: 11,258.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,187.76 : 28,785.96 = 7,504.32 : x
  2. Step 2: Convert to fraction form
    19,187.76/28,785.96 = 7,504.32/x
  3. Step 3: Cross multiply
    19,187.76x = 28,785.96 × 7,504.32
  4. Step 4: Simplify right side
    19,187.76x = 216,019,055.35
  5. Step 5: Solve for x
    x = 216,019,055.35/19,187.76
  6. Step 6: Final answer
    x = 11,258.17

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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.