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Finding the Fourth Proportional to 15,652.80, 21,600.75 and 8,579.10

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Solution

The fourth proportional to 15,652.80, 21,600.75 and 8,579.10 is: 11,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,652.80 : 21,600.75 = 8,579.10 : x
  2. Step 2: Convert to fraction form
    15,652.80/21,600.75 = 8,579.10/x
  3. Step 3: Cross multiply
    15,652.80x = 21,600.75 × 8,579.10
  4. Step 4: Simplify right side
    15,652.80x = 185,314,994.33
  5. Step 5: Solve for x
    x = 185,314,994.33/15,652.80
  6. Step 6: Final answer
    x = 11,839.10

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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.