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Finding the Fourth Proportional to 15,589.50, 21,511.08 and 8,875.44

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Solution

The fourth proportional to 15,589.50, 21,511.08 and 8,875.44 is: 12,246.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589.50 : 21,511.08 = 8,875.44 : x
  2. Step 2: Convert to fraction form
    15,589.50/21,511.08 = 8,875.44/x
  3. Step 3: Cross multiply
    15,589.50x = 21,511.08 × 8,875.44
  4. Step 4: Simplify right side
    15,589.50x = 190,920,299.88
  5. Step 5: Solve for x
    x = 190,920,299.88/15,589.50
  6. Step 6: Final answer
    x = 12,246.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.