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Finding the Fourth Proportional to 15,551.64, 21,461.49 and 9,579.92

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Solution

The fourth proportional to 15,551.64, 21,461.49 and 9,579.92 is: 13,220.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,551.64 : 21,461.49 = 9,579.92 : x
  2. Step 2: Convert to fraction form
    15,551.64/21,461.49 = 9,579.92/x
  3. Step 3: Cross multiply
    15,551.64x = 21,461.49 × 9,579.92
  4. Step 4: Simplify right side
    15,551.64x = 205,599,249.97
  5. Step 5: Solve for x
    x = 205,599,249.97/15,551.64
  6. Step 6: Final answer
    x = 13,220.42

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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.