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Finding the Fourth Proportional to 15,486.55, 21,371.90 and 8,773.13

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Solution

The fourth proportional to 15,486.55, 21,371.90 and 8,773.13 is: 12,107.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.55 : 21,371.90 = 8,773.13 : x
  2. Step 2: Convert to fraction form
    15,486.55/21,371.90 = 8,773.13/x
  3. Step 3: Cross multiply
    15,486.55x = 21,371.90 × 8,773.13
  4. Step 4: Simplify right side
    15,486.55x = 187,498,457.05
  5. Step 5: Solve for x
    x = 187,498,457.05/15,486.55
  6. Step 6: Final answer
    x = 12,107.18

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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.