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Finding the Fourth Proportional to 19,563.88, 26,991.08 and 12,853.16

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Solution

The fourth proportional to 19,563.88, 26,991.08 and 12,853.16 is: 17,732.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,563.88 : 26,991.08 = 12,853.16 : x
  2. Step 2: Convert to fraction form
    19,563.88/26,991.08 = 12,853.16/x
  3. Step 3: Cross multiply
    19,563.88x = 26,991.08 × 12,853.16
  4. Step 4: Simplify right side
    19,563.88x = 346,920,669.81
  5. Step 5: Solve for x
    x = 346,920,669.81/19,563.88
  6. Step 6: Final answer
    x = 17,732.71

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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.