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Finding the Fourth Proportional to 11,987.21, 17,980.98 and 4,592.04

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Solution

The fourth proportional to 11,987.21, 17,980.98 and 4,592.04 is: 6,888.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.21 : 17,980.98 = 4,592.04 : x
  2. Step 2: Convert to fraction form
    11,987.21/17,980.98 = 4,592.04/x
  3. Step 3: Cross multiply
    11,987.21x = 17,980.98 × 4,592.04
  4. Step 4: Simplify right side
    11,987.21x = 82,569,379.40
  5. Step 5: Solve for x
    x = 82,569,379.40/11,987.21
  6. Step 6: Final answer
    x = 6,888.13

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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.