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Finding the Fourth Proportional to 15,572.50, 21,491.86 and 8,859.14

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Solution

The fourth proportional to 15,572.50, 21,491.86 and 8,859.14 is: 12,226.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.50 : 21,491.86 = 8,859.14 : x
  2. Step 2: Convert to fraction form
    15,572.50/21,491.86 = 8,859.14/x
  3. Step 3: Cross multiply
    15,572.50x = 21,491.86 × 8,859.14
  4. Step 4: Simplify right side
    15,572.50x = 190,399,396.60
  5. Step 5: Solve for x
    x = 190,399,396.60/15,572.50
  6. Step 6: Final answer
    x = 12,226.64

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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.