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Finding the Fourth Proportional to 17,015.66, 25,425.87 and 12,990.77

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Solution

The fourth proportional to 17,015.66, 25,425.87 and 12,990.77 is: 19,411.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,015.66 : 25,425.87 = 12,990.77 : x
  2. Step 2: Convert to fraction form
    17,015.66/25,425.87 = 12,990.77/x
  3. Step 3: Cross multiply
    17,015.66x = 25,425.87 × 12,990.77
  4. Step 4: Simplify right side
    17,015.66x = 330,301,629.22
  5. Step 5: Solve for x
    x = 330,301,629.22/17,015.66
  6. Step 6: Final answer
    x = 19,411.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.