Home / 12,742.90-19,114.89-3,978.16

Finding the Fourth Proportional to 12,742.90, 19,114.89 and 3,978.16

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Solution

The fourth proportional to 12,742.90, 19,114.89 and 3,978.16 is: 5,967.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.90 : 19,114.89 = 3,978.16 : x
  2. Step 2: Convert to fraction form
    12,742.90/19,114.89 = 3,978.16/x
  3. Step 3: Cross multiply
    12,742.90x = 19,114.89 × 3,978.16
  4. Step 4: Simplify right side
    12,742.90x = 76,042,090.80
  5. Step 5: Solve for x
    x = 76,042,090.80/12,742.90
  6. Step 6: Final answer
    x = 5,967.41

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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.