Home / 12,638.50-18,970.56-11,397.46

Finding the Fourth Proportional to 12,638.50, 18,970.56 and 11,397.46

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Solution

The fourth proportional to 12,638.50, 18,970.56 and 11,397.46 is: 17,107.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.50 : 18,970.56 = 11,397.46 : x
  2. Step 2: Convert to fraction form
    12,638.50/18,970.56 = 11,397.46/x
  3. Step 3: Cross multiply
    12,638.50x = 18,970.56 × 11,397.46
  4. Step 4: Simplify right side
    12,638.50x = 216,216,198.78
  5. Step 5: Solve for x
    x = 216,216,198.78/12,638.50
  6. Step 6: Final answer
    x = 17,107.74

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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.