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Finding the Fourth Proportional to 28,398.58, 42,566.01 and 9,661.12

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Solution

The fourth proportional to 28,398.58, 42,566.01 and 9,661.12 is: 14,480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398.58 : 42,566.01 = 9,661.12 : x
  2. Step 2: Convert to fraction form
    28,398.58/42,566.01 = 9,661.12/x
  3. Step 3: Cross multiply
    28,398.58x = 42,566.01 × 9,661.12
  4. Step 4: Simplify right side
    28,398.58x = 411,235,330.53
  5. Step 5: Solve for x
    x = 411,235,330.53/28,398.58
  6. Step 6: Final answer
    x = 14,480.84

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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.