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Finding the Fourth Proportional to 28,620.89, 42,926.47 and 7,561.16

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Solution

The fourth proportional to 28,620.89, 42,926.47 and 7,561.16 is: 11,340.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.89 : 42,926.47 = 7,561.16 : x
  2. Step 2: Convert to fraction form
    28,620.89/42,926.47 = 7,561.16/x
  3. Step 3: Cross multiply
    28,620.89x = 42,926.47 × 7,561.16
  4. Step 4: Simplify right side
    28,620.89x = 324,573,655.47
  5. Step 5: Solve for x
    x = 324,573,655.47/28,620.89
  6. Step 6: Final answer
    x = 11,340.45

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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.