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Finding the Fourth Proportional to 13,449.51, 20,151.99 and 6,866.64

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Solution

The fourth proportional to 13,449.51, 20,151.99 and 6,866.64 is: 10,288.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,449.51 : 20,151.99 = 6,866.64 : x
  2. Step 2: Convert to fraction form
    13,449.51/20,151.99 = 6,866.64/x
  3. Step 3: Cross multiply
    13,449.51x = 20,151.99 × 6,866.64
  4. Step 4: Simplify right side
    13,449.51x = 138,376,460.61
  5. Step 5: Solve for x
    x = 138,376,460.61/13,449.51
  6. Step 6: Final answer
    x = 10,288.59

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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.