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Finding the Fourth Proportional to 15,060.84, 20,783.60 and 8,687.44

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Solution

The fourth proportional to 15,060.84, 20,783.60 and 8,687.44 is: 11,988.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,060.84 : 20,783.60 = 8,687.44 : x
  2. Step 2: Convert to fraction form
    15,060.84/20,783.60 = 8,687.44/x
  3. Step 3: Cross multiply
    15,060.84x = 20,783.60 × 8,687.44
  4. Step 4: Simplify right side
    15,060.84x = 180,556,276.09
  5. Step 5: Solve for x
    x = 180,556,276.09/15,060.84
  6. Step 6: Final answer
    x = 11,988.46

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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.