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Finding the Fourth Proportional to 28,582.62, 42,871.05 and 7,808.22

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Solution

The fourth proportional to 28,582.62, 42,871.05 and 7,808.22 is: 11,711.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,582.62 : 42,871.05 = 7,808.22 : x
  2. Step 2: Convert to fraction form
    28,582.62/42,871.05 = 7,808.22/x
  3. Step 3: Cross multiply
    28,582.62x = 42,871.05 × 7,808.22
  4. Step 4: Simplify right side
    28,582.62x = 334,746,590.03
  5. Step 5: Solve for x
    x = 334,746,590.03/28,582.62
  6. Step 6: Final answer
    x = 11,711.54

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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.