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Finding the Fourth Proportional to 28,320.74, 42,478.37 and 8,599.47

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Solution

The fourth proportional to 28,320.74, 42,478.37 and 8,599.47 is: 12,898.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,320.74 : 42,478.37 = 8,599.47 : x
  2. Step 2: Convert to fraction form
    28,320.74/42,478.37 = 8,599.47/x
  3. Step 3: Cross multiply
    28,320.74x = 42,478.37 × 8,599.47
  4. Step 4: Simplify right side
    28,320.74x = 365,291,425.47
  5. Step 5: Solve for x
    x = 365,291,425.47/28,320.74
  6. Step 6: Final answer
    x = 12,898.37

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.