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Finding the Fourth Proportional to 17,777.16, 26,690.04 and 9,991.44

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Solution

The fourth proportional to 17,777.16, 26,690.04 and 9,991.44 is: 15,000.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,777.16 : 26,690.04 = 9,991.44 : x
  2. Step 2: Convert to fraction form
    17,777.16/26,690.04 = 9,991.44/x
  3. Step 3: Cross multiply
    17,777.16x = 26,690.04 × 9,991.44
  4. Step 4: Simplify right side
    17,777.16x = 266,671,933.26
  5. Step 5: Solve for x
    x = 266,671,933.26/17,777.16
  6. Step 6: Final answer
    x = 15,000.82

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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.