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Finding the Fourth Proportional to 14,693.51, 20,278.29 and 8,321.21

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Solution

The fourth proportional to 14,693.51, 20,278.29 and 8,321.21 is: 11,483.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,693.51 : 20,278.29 = 8,321.21 : x
  2. Step 2: Convert to fraction form
    14,693.51/20,278.29 = 8,321.21/x
  3. Step 3: Cross multiply
    14,693.51x = 20,278.29 × 8,321.21
  4. Step 4: Simplify right side
    14,693.51x = 168,740,029.45
  5. Step 5: Solve for x
    x = 168,740,029.45/14,693.51
  6. Step 6: Final answer
    x = 11,483.99

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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.