Home / 12,987.78-19,486.19-4,104.46

Finding the Fourth Proportional to 12,987.78, 19,486.19 and 4,104.46

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Solution

The fourth proportional to 12,987.78, 19,486.19 and 4,104.46 is: 6,158.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.78 : 19,486.19 = 4,104.46 : x
  2. Step 2: Convert to fraction form
    12,987.78/19,486.19 = 4,104.46/x
  3. Step 3: Cross multiply
    12,987.78x = 19,486.19 × 4,104.46
  4. Step 4: Simplify right side
    12,987.78x = 79,980,287.41
  5. Step 5: Solve for x
    x = 79,980,287.41/12,987.78
  6. Step 6: Final answer
    x = 6,158.12

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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.