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Finding the Fourth Proportional to 15,104.56, 20,842.76 and 8,820.58

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Solution

The fourth proportional to 15,104.56, 20,842.76 and 8,820.58 is: 12,171.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,104.56 : 20,842.76 = 8,820.58 : x
  2. Step 2: Convert to fraction form
    15,104.56/20,842.76 = 8,820.58/x
  3. Step 3: Cross multiply
    15,104.56x = 20,842.76 × 8,820.58
  4. Step 4: Simplify right side
    15,104.56x = 183,845,232.00
  5. Step 5: Solve for x
    x = 183,845,232.00/15,104.56
  6. Step 6: Final answer
    x = 12,171.51

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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.