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Finding the Fourth Proportional to 28,404.56, 42,607.11 and 7,628.06

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Solution

The fourth proportional to 28,404.56, 42,607.11 and 7,628.06 is: 11,442.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.56 : 42,607.11 = 7,628.06 : x
  2. Step 2: Convert to fraction form
    28,404.56/42,607.11 = 7,628.06/x
  3. Step 3: Cross multiply
    28,404.56x = 42,607.11 × 7,628.06
  4. Step 4: Simplify right side
    28,404.56x = 325,009,591.51
  5. Step 5: Solve for x
    x = 325,009,591.51/28,404.56
  6. Step 6: Final answer
    x = 11,442.16

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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.