Home / 21,256.37-31,847.70-12,918.88

Finding the Fourth Proportional to 21,256.37, 31,847.70 and 12,918.88

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Solution

The fourth proportional to 21,256.37, 31,847.70 and 12,918.88 is: 19,355.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.37 : 31,847.70 = 12,918.88 : x
  2. Step 2: Convert to fraction form
    21,256.37/31,847.70 = 12,918.88/x
  3. Step 3: Cross multiply
    21,256.37x = 31,847.70 × 12,918.88
  4. Step 4: Simplify right side
    21,256.37x = 411,436,534.96
  5. Step 5: Solve for x
    x = 411,436,534.96/21,256.37
  6. Step 6: Final answer
    x = 19,355.91

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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.