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Finding the Fourth Proportional to 14,693.64, 20,277.16 and 7,979.21

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Solution

The fourth proportional to 14,693.64, 20,277.16 and 7,979.21 is: 11,011.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,693.64 : 20,277.16 = 7,979.21 : x
  2. Step 2: Convert to fraction form
    14,693.64/20,277.16 = 7,979.21/x
  3. Step 3: Cross multiply
    14,693.64x = 20,277.16 × 7,979.21
  4. Step 4: Simplify right side
    14,693.64x = 161,795,677.95
  5. Step 5: Solve for x
    x = 161,795,677.95/14,693.64
  6. Step 6: Final answer
    x = 11,011.27

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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.