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Finding the Fourth Proportional to 14,693.29, 20,276.68 and 7,978.87

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Solution

The fourth proportional to 14,693.29, 20,276.68 and 7,978.87 is: 11,010.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,693.29 : 20,276.68 = 7,978.87 : x
  2. Step 2: Convert to fraction form
    14,693.29/20,276.68 = 7,978.87/x
  3. Step 3: Cross multiply
    14,693.29x = 20,276.68 × 7,978.87
  4. Step 4: Simplify right side
    14,693.29x = 161,784,993.75
  5. Step 5: Solve for x
    x = 161,784,993.75/14,693.29
  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.