Home / 12,118.20-16,731.40-9,280.56

Finding the Fourth Proportional to 12,118.20, 16,731.40 and 9,280.56

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Solution

The fourth proportional to 12,118.20, 16,731.40 and 9,280.56 is: 12,813.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.20 : 16,731.40 = 9,280.56 : x
  2. Step 2: Convert to fraction form
    12,118.20/16,731.40 = 9,280.56/x
  3. Step 3: Cross multiply
    12,118.20x = 16,731.40 × 9,280.56
  4. Step 4: Simplify right side
    12,118.20x = 155,276,761.58
  5. Step 5: Solve for x
    x = 155,276,761.58/12,118.20
  6. Step 6: Final answer
    x = 12,813.52

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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.