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Finding the Fourth Proportional to 28,359.86, 42,539.78 and 7,582.82

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Solution

The fourth proportional to 28,359.86, 42,539.78 and 7,582.82 is: 11,374.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.86 : 42,539.78 = 7,582.82 : x
  2. Step 2: Convert to fraction form
    28,359.86/42,539.78 = 7,582.82/x
  3. Step 3: Cross multiply
    28,359.86x = 42,539.78 × 7,582.82
  4. Step 4: Simplify right side
    28,359.86x = 322,571,281.88
  5. Step 5: Solve for x
    x = 322,571,281.88/28,359.86
  6. Step 6: Final answer
    x = 11,374.22

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1.5x scale

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.