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Finding the Fourth Proportional to 15,842.56, 21,860.48 and 8,768.88

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Solution

The fourth proportional to 15,842.56, 21,860.48 and 8,768.88 is: 12,099.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,842.56 : 21,860.48 = 8,768.88 : x
  2. Step 2: Convert to fraction form
    15,842.56/21,860.48 = 8,768.88/x
  3. Step 3: Cross multiply
    15,842.56x = 21,860.48 × 8,768.88
  4. Step 4: Simplify right side
    15,842.56x = 191,691,925.86
  5. Step 5: Solve for x
    x = 191,691,925.86/15,842.56
  6. Step 6: Final answer
    x = 12,099.81

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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.