Home / 12,647.06-18,995.18-10,308.78

Finding the Fourth Proportional to 12,647.06, 18,995.18 and 10,308.78

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Solution

The fourth proportional to 12,647.06, 18,995.18 and 10,308.78 is: 15,483.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.06 : 18,995.18 = 10,308.78 : x
  2. Step 2: Convert to fraction form
    12,647.06/18,995.18 = 10,308.78/x
  3. Step 3: Cross multiply
    12,647.06x = 18,995.18 × 10,308.78
  4. Step 4: Simplify right side
    12,647.06x = 195,817,131.68
  5. Step 5: Solve for x
    x = 195,817,131.68/12,647.06
  6. Step 6: Final answer
    x = 15,483.21

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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.