Home / 21,416.34-29,555.91-11,985.60

Finding the Fourth Proportional to 21,416.34, 29,555.91 and 11,985.60

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Solution

The fourth proportional to 21,416.34, 29,555.91 and 11,985.60 is: 16,540.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.34 : 29,555.91 = 11,985.60 : x
  2. Step 2: Convert to fraction form
    21,416.34/29,555.91 = 11,985.60/x
  3. Step 3: Cross multiply
    21,416.34x = 29,555.91 × 11,985.60
  4. Step 4: Simplify right side
    21,416.34x = 354,245,314.90
  5. Step 5: Solve for x
    x = 354,245,314.90/21,416.34
  6. Step 6: Final answer
    x = 16,540.89

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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.