Home / 12,857.20-19,281.65-4,090.06

Finding the Fourth Proportional to 12,857.20, 19,281.65 and 4,090.06

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Solution

The fourth proportional to 12,857.20, 19,281.65 and 4,090.06 is: 6,133.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.20 : 19,281.65 = 4,090.06 : x
  2. Step 2: Convert to fraction form
    12,857.20/19,281.65 = 4,090.06/x
  3. Step 3: Cross multiply
    12,857.20x = 19,281.65 × 4,090.06
  4. Step 4: Simplify right side
    12,857.20x = 78,863,109.05
  5. Step 5: Solve for x
    x = 78,863,109.05/12,857.20
  6. Step 6: Final answer
    x = 6,133.77

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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.