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Finding the Fourth Proportional to 28,359.92, 42,539.87 and 7,582.88

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Solution

The fourth proportional to 28,359.92, 42,539.87 and 7,582.88 is: 11,374.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.92 : 42,539.87 = 7,582.88 : x
  2. Step 2: Convert to fraction form
    28,359.92/42,539.87 = 7,582.88/x
  3. Step 3: Cross multiply
    28,359.92x = 42,539.87 × 7,582.88
  4. Step 4: Simplify right side
    28,359.92x = 322,574,535.68
  5. Step 5: Solve for x
    x = 322,574,535.68/28,359.92
  6. Step 6: Final answer
    x = 11,374.31

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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.