Home / 12,638.31-18,957.95-3,278.08

Finding the Fourth Proportional to 12,638.31, 18,957.95 and 3,278.08

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Solution

The fourth proportional to 12,638.31, 18,957.95 and 3,278.08 is: 4,917.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.31 : 18,957.95 = 3,278.08 : x
  2. Step 2: Convert to fraction form
    12,638.31/18,957.95 = 3,278.08/x
  3. Step 3: Cross multiply
    12,638.31x = 18,957.95 × 3,278.08
  4. Step 4: Simplify right side
    12,638.31x = 62,145,676.74
  5. Step 5: Solve for x
    x = 62,145,676.74/12,638.31
  6. Step 6: Final answer
    x = 4,917.25

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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.