Home / 12,947.40-17,861.30-7,638.68

Finding the Fourth Proportional to 12,947.40, 17,861.30 and 7,638.68

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Solution

The fourth proportional to 12,947.40, 17,861.30 and 7,638.68 is: 10,537.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.40 : 17,861.30 = 7,638.68 : x
  2. Step 2: Convert to fraction form
    12,947.40/17,861.30 = 7,638.68/x
  3. Step 3: Cross multiply
    12,947.40x = 17,861.30 × 7,638.68
  4. Step 4: Simplify right side
    12,947.40x = 136,436,755.08
  5. Step 5: Solve for x
    x = 136,436,755.08/12,947.40
  6. Step 6: Final answer
    x = 10,537.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.