Home / 12,947.80-19,408.90-5,146.20

Finding the Fourth Proportional to 12,947.80, 19,408.90 and 5,146.20

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Solution

The fourth proportional to 12,947.80, 19,408.90 and 5,146.20 is: 7,714.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.80 : 19,408.90 = 5,146.20 : x
  2. Step 2: Convert to fraction form
    12,947.80/19,408.90 = 5,146.20/x
  3. Step 3: Cross multiply
    12,947.80x = 19,408.90 × 5,146.20
  4. Step 4: Simplify right side
    12,947.80x = 99,882,081.18
  5. Step 5: Solve for x
    x = 99,882,081.18/12,947.80
  6. Step 6: Final answer
    x = 7,714.21

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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.