Home / 20,853.34-31,287.36-13,861.12

Finding the Fourth Proportional to 20,853.34, 31,287.36 and 13,861.12

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Solution

The fourth proportional to 20,853.34, 31,287.36 and 13,861.12 is: 20,796.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.34 : 31,287.36 = 13,861.12 : x
  2. Step 2: Convert to fraction form
    20,853.34/31,287.36 = 13,861.12/x
  3. Step 3: Cross multiply
    20,853.34x = 31,287.36 × 13,861.12
  4. Step 4: Simplify right side
    20,853.34x = 433,677,851.44
  5. Step 5: Solve for x
    x = 433,677,851.44/20,853.34
  6. Step 6: Final answer
    x = 20,796.57

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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.