Home / 28,618.09-42,929.87-8,891.35

Finding the Fourth Proportional to 28,618.09, 42,929.87 and 8,891.35

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Solution

The fourth proportional to 28,618.09, 42,929.87 and 8,891.35 is: 13,337.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.09 : 42,929.87 = 8,891.35 : x
  2. Step 2: Convert to fraction form
    28,618.09/42,929.87 = 8,891.35/x
  3. Step 3: Cross multiply
    28,618.09x = 42,929.87 × 8,891.35
  4. Step 4: Simplify right side
    28,618.09x = 381,704,347.84
  5. Step 5: Solve for x
    x = 381,704,347.84/28,618.09
  6. Step 6: Final answer
    x = 13,337.87

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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.