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Finding the Fourth Proportional to 20,566.56, 30,842.08 and 7,415.68

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Solution

The fourth proportional to 20,566.56, 30,842.08 and 7,415.68 is: 11,120.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,566.56 : 30,842.08 = 7,415.68 : x
  2. Step 2: Convert to fraction form
    20,566.56/30,842.08 = 7,415.68/x
  3. Step 3: Cross multiply
    20,566.56x = 30,842.08 × 7,415.68
  4. Step 4: Simplify right side
    20,566.56x = 228,714,995.81
  5. Step 5: Solve for x
    x = 228,714,995.81/20,566.56
  6. Step 6: Final answer
    x = 11,120.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.