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Finding the Fourth Proportional to 12,991.26, 19,446.63 and 7,053.45

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Solution

The fourth proportional to 12,991.26, 19,446.63 and 7,053.45 is: 10,558.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.26 : 19,446.63 = 7,053.45 : x
  2. Step 2: Convert to fraction form
    12,991.26/19,446.63 = 7,053.45/x
  3. Step 3: Cross multiply
    12,991.26x = 19,446.63 × 7,053.45
  4. Step 4: Simplify right side
    12,991.26x = 137,165,832.37
  5. Step 5: Solve for x
    x = 137,165,832.37/12,991.26
  6. Step 6: Final answer
    x = 10,558.32

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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.