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Finding the Fourth Proportional to 14,693.20, 20,276.64 and 7,978.84

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Solution

The fourth proportional to 14,693.20, 20,276.64 and 7,978.84 is: 11,010.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,693.20 : 20,276.64 = 7,978.84 : x
  2. Step 2: Convert to fraction form
    14,693.20/20,276.64 = 7,978.84/x
  3. Step 3: Cross multiply
    14,693.20x = 20,276.64 × 7,978.84
  4. Step 4: Simplify right side
    14,693.20x = 161,784,066.30
  5. Step 5: Solve for x
    x = 161,784,066.30/14,693.20
  6. Step 6: Final answer
    x = 11,010.81

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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.