Home / 21,254.22-31,876.56-12,904.29

Finding the Fourth Proportional to 21,254.22, 31,876.56 and 12,904.29

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Solution

The fourth proportional to 21,254.22, 31,876.56 and 12,904.29 is: 19,353.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.22 : 31,876.56 = 12,904.29 : x
  2. Step 2: Convert to fraction form
    21,254.22/31,876.56 = 12,904.29/x
  3. Step 3: Cross multiply
    21,254.22x = 31,876.56 × 12,904.29
  4. Step 4: Simplify right side
    21,254.22x = 411,344,374.44
  5. Step 5: Solve for x
    x = 411,344,374.44/21,254.22
  6. Step 6: Final answer
    x = 19,353.54

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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.