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Finding the Fourth Proportional to 18,590.55, 27,885.86 and 7,914.15

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Solution

The fourth proportional to 18,590.55, 27,885.86 and 7,914.15 is: 11,871.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,590.55 : 27,885.86 = 7,914.15 : x
  2. Step 2: Convert to fraction form
    18,590.55/27,885.86 = 7,914.15/x
  3. Step 3: Cross multiply
    18,590.55x = 27,885.86 × 7,914.15
  4. Step 4: Simplify right side
    18,590.55x = 220,692,839.35
  5. Step 5: Solve for x
    x = 220,692,839.35/18,590.55
  6. Step 6: Final answer
    x = 11,871.24

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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.